06/02/2026

Shipping from China to Port of Long Beach: Required Documents and Customs Tips

Table of Contents

Introduction

If you send anything from China to the U.S., it’s likely that your containers will go via the Port of Long Beach in Southern California at some point. In 2025, the port handled over 9.9 million TEUs, making it its largest year ever. It forecasts another very busy year in 2026. Even if tariffs and trade are unstable, operations have been surprisingly seamless, with no major delays or traffic jams.

That’s fantastic news for people who bring things in. The bad news is that it hasn’t gotten any easier to follow U.S. customs rules. There are more risks because of restrictions about paperwork, the Importer Security Filing (ISF 10+2), changes to tariffs, rules that apply only to certain products, and port security. If you don’t have the right document or HS code, your quick, seamless arrival might quickly morph into weeks of delays and hundreds or thousands of dollars in extra fees.

This tutorial is for firms that transport goods from China to the US through Long Beach, especially small and medium-sized businesses and e-commerce brands that can’t afford to make mistakes with customs. Our main focus will be:

The important papers you need to ship by sea to Long Beach
How ISF 10+2 works in 2025 and 2026
What customs and the terminal check when your shipment gets there
Useful methods to keep your goods moving and avoid extra inspections

We’ll also show you how a professional forwarder like Topway Shipping can quietly take care of the hard portions of paperwork so you can focus on selling instead of chasing forms.

1. Why Long Beach is such a critical gateway for China–U.S. trade

Long Beach is one of the best “front doors” into the U.S. market for importers who buy from China. It handles a lot of trans-Pacific containerized trade along with the nearby Port of Los Angeles. It is now the main entry point for consumer products going to the Western and Central U.S.

Long Beach handled roughly 9.9 million TEUs in 2025, the most it has ever handled in its 115-year existence. Port management said that goods moved at a steady rate, with no major delays or problems, even though trade was unstable and taxes were changing.

This means for you as a shipper:

From major Chinese ports including Shenzhen, Shanghai, Ningbo, Qingdao, and others, ships often come into Long Beach.
The port is spending billions of dollars on automation, equipment that doesn’t pollute, and digital visibility platforms until 2050. Its goal is to increase its capacity while keeping goods moving smoothly.

But when the physical flow gets smoother, customs compliance becomes more of a problem. Carriers and terminals can help, but if your paperwork is missing, inaccurate, or late, your cargo will still sit.

2. Big picture: how a shipment from China to Long Beach actually flows

Before we look at each document, it helps to picture how a normal FCL or LCL shipment goes through its life cycle.

First, you send your supplier a purchase order. You agree on the Incoterms (such FOB Shenzhen or EXW plant), the price, and the timeline for making the goods. As your supplier finishes making your order, they generate a commercial invoice and a packing list. These will be used to figure up your customs declaration and duty later on.

Next, a freight forwarder makes a reservation for space on a ship and arranges for the cargo to be picked up. For ocean shipments to the U.S., Importer Security Filing (ISF 10+2) data must be sent to the U.S. Customs and Border Protection must be notified at least 24 hours before the container is placed onto the ship at the Chinese port. You could get fined or have your stuff held if you miss this deadline.

The carrier gives a bill of lading after the container is loaded. The ship sails for 15 to 30 days, depending on the itinerary and any stops along the way. During this time, your customs broker (or your logistics provider if they also act as broker) prepares the formal customs entry, connects your bond to the shipment, and makes sure that duties and taxes are paid on time.

When the ship gets to Long Beach, it unloads containers and stacks them in the terminal. When your shipment arrives, the carrier or terminal sends you an arrival notice. Along with your commercial invoice, packing list, and other supporting papers, your customs entry is filed with CBP (or previously pre-filed). Your consignment may be picked by CBP for X-ray scanning or a physical exam.

A trucker can only pick up your container after CBP lets it go and all port and terminal fees are paid. From there, it might proceed straight to your warehouse, to a rail ramp in the middle of the country, or to a transload facility where cartons are loaded into domestic trucks.

At least one document is affected by each of the steps above. The more you take care of those papers, the fewer shocks you’ll have.

3. The essential document stack for China → Long Beach shipments

There are many papers that can be related to a shipment, but there are always a few that are needed for U.S. ocean imports. Industry guides and customs brokers always list the same things: a commercial invoice, a packing list, a bill of lading, an ISF, an arrival notice, a customs bond, and entry forms. Sometimes, depending on the goods, they also list a certificate of origin and special certificates.

Here is a useful overview for cargo going to Long Beach:

Stage / Timing	Document(s)	Who prepares it	When it is due	Why it matters for customs and the port
Before booking or production finishes	Pro forma invoice / purchase order	Supplier and buyer	As early as possible	Sets product description, HS code planning, Incoterms
Before ISF filing	Commercial invoice, packing list	Supplier	Before ISF cut-off (often several days pre-loading)	Provides key data for HS classification and ISF fields
Before vessel loading in China	ISF 10+2 (Import Security Filing)	Importer or agent / broker	At least 24 hours before container loading	Mandatory for security screening of ocean imports
At or shortly after vessel loading	Bill of lading (B/L)	Ocean carrier / NVOCC	Issued after container is on board	Contract of carriage, proof of shipment, title to goods
During transit	Customs bond and Power of Attorney	Importer (via surety / broker)	Before customs entry filing	Guarantees payment of duties and compliance
A few days before U.S. arrival	Entry documents (CBP Forms 3461, 7501)	Customs broker	Often pre-filed before vessel arrival	Formal customs entry and duty calculation
At or just after arrival in Long Beach	Arrival notice and terminal release docs	Carrier / terminal	Upon vessel discharge and availability	Allows cargo pick-up scheduling and fee payment
Product-specific stage (if applicable)	Certificates (FDA, FCC, USDA, CPSC, etc.)	Manufacturer, testing lab, authority	Before shipment or before customs entry	Proves safety, compliance and eligibility

Let’s break these down into more useful terms below.

Commercial invoice

The commercial invoice is the most important document. It should clearly reflect the seller’s and buyer’s information, the description of the items, the HS codes, the unit price, the total price, the currency, the Incoterms, and the place of origin. CBP utilizes it to figure out duties and make sure that values aren’t too low.

Some common mistakes are using nonspecific terms like “electronics” instead of “Bluetooth headphones,” not including HS codes, using different currencies, or sending invoices that aren’t in English. Any of those things could make you have to answer more questions or take a test.

Packing list

The packing list is like a “map” for your shipment. It lists the number of boxes, what is within each one, their weights, and their sizes. Terminals and truckers use it to plan how to handle things and how much room they need. CBP utilizes it to make sure that the contents of the container match the invoice.

If customs opens your container, you need to have an exact packing list. Inspections go significantly faster when the paperwork matches what they observe accurately.

Bill of lading (B/L)

The carrier or NVOCC gives you the B/L, which serves as your contract of carriage, receipt for the goods, and occasionally proof of ownership. It lists the shipper, consignee, notify party, vessel, voyage, port of loading, port of discharge, and a brief description of the cargo.

The information on the B/L must match the ISF and the customs entry. You could have to pay a lot of money to change things if the consignee name or container number is wrong.

Import Security Filing (ISF 10+2)

ISF is not a piece of paper. It is an electronic data submission to CBP that includes 10 pieces of information from the importer (such the seller, buyer, manufacturer, consignee number, country of origin, and HS code) and 2 pieces of information from the carrier. It is necessary for all ocean container shipments coming into the U.S. and must be lodged at least 24 hours before the ship leaves the foreign port.

This is one of the most time-sensitive “documents” for shipments from China to Long Beach because late or missing ISFs can result in fines and cargo detention.

Arrival notice, customs bond and entry documents

When your ship gets close to Long Beach, the carrier or its agent sends an arrival notice. Your broker has either already filed or will file the customs entry, which is CBP Form 3461 (release) and CBP Form 7501 (entry summary), with a valid customs bond.

If there are any inconsistencies in your paperwork at this point, CBP may hold off on releasing it until they get more information or papers.

Special certificates and licenses

There are a lot of different types of things that need extra documentation. For example, food and medical products need FDA approval, certain agricultural imports need USDA approval, communications equipment needs FCC approval, and children’s toys need CPSC test reports. Industry guidelines say that items must be ready before shipping, or you could face extended delays, especially at big ports like extended Beach where regulators work closely with CBP.

4. Deep dive: ISF 10+2 for Long Beach-bound containers

Many exporters in China and newer importers get stuck at ISF. Problems with this can lead to fines long before your container even gets to Long Beach, since it is lodged before the products are even loaded.

According to CBP’s current rules, the ISF (for ocean containerized cargo) must be received at least 24 hours before the vessel is loaded at the foreign port. It must also include ten specific data elements from the importer side (seller, buyer, importer of record number, consignee, manufacturer/supplier, ship-to party, country of origin, commodity HTSUS number, container stuffing locati0n, consolidator) and two elements from the carrier side (vessel stow plan, container status messages).

Importers who focus on Long Beach should keep the following in mind:

First, be responsible. The importer of record, not the Chinese provider, is legally responsible for ISF. A lot of importers, especially those that sell online, let their freight forwarder or customs broker file for them. But if the information is false, CBP still holds the importer liable. This is why you shouldn’t let your supplier “handle everything” without checking up on them.

Second, the quality of the data. A lot of ISF mistakes happen because of tiny factors, including an address that isn’t quite right, a suite number that isn’t there, a manufacturer name that isn’t complete, or an HS code that isn’t up to date. Recent instructions for online sellers say that ISF should be treated as part of your overall data discipline. This means making sure that purchase orders, supplier master data, and warehouse SKUs are all in sync so that the information that goes into ISF is always the same.

Third, timing and changes. If you need to change an ISF (for example, the site of the container stuffing or the consolidator), some things can be changed while the ship is on the water, but there are cut-offs before it arrives. Carriers and brokers suggest that you lock in your supplier lineup and booking details as soon as possible , avoid changes at the last minute that could confound both CBP and the vessel operator.

Last but not least, punishments. If you file your ISF late or incorrectly, CBP can fine you and keep your cargo at the terminal until the problems are fixed. Even if the port is busy and not too crowded, a customs hold will still keep your container in a Long Beach stack, which will cost you storage fees and make it hard to get your goods on time.

5. What happens at Long Beach: customs and terminal focus points

When your ship arrives and the containers are unloaded, a number of processes happen at the same time between CBP, the terminal operator, and your logistics partners.

CBP checks shipments with a combination of automated targeting, reviewing documents, and intelligence. Things including the type of goods, the country of origin, the shipment’s history of compliance, and abrupt increases in volume can all affect whether a shipment is highlighted for closer scrutiny. Industry overviews of the import process stress this multi-layered screening step, especially for new importers and companies that are considered high-risk.

The Long Beach terminal is also in charge of scheduling trucks, maintaining yard space, and managing equipment. Port authorities have said in the past few years that Long Beach’s operations have been smooth, with no major delays or backups in 2025, even though tariffs and global markets have been unstable. They predict 2026 to be just as strong but manageable.

The most important questions for you are:

Has CBP let the shipment go, or is it still on hold while they check the paperwork or inspect it?
Have you paid the terminal and carrier fees and sent the release instructions?
Has your trucker made a pick-up appointment during free time so they don’t have to pay for storage or demurrage?

When you go through customs in Long Beach, you normally have to go through one of the following: a document review, an X-ray (NII) exam, a tailgate exam, or an intensive exam in a warehouse. You can’t choose who CBP choose, but you can make a big difference in how quickly an exam ends by making sure your paperwork and packing are clear. Inspectors can easily check that the cargo fits the paperwork provided the business invoice and packing list are clear and well-organized.

The 2025 catastrophe in which dozens of containers fell from a ship at Long Beach’s Pier G is another example of how safety and stowage are still important. Operations at the terminal stopped while authorities guarded the area, even though no one was hurt. Things like this remind us that following the rules and keeping good records are important for both maritime safety and customs compliance.

6. Practical customs tips for 2025–2026: how to keep cargo moving

The list of fundamental documents hasn’t changed much in years, but the situation between China and the U.S. has. Trade has changed for sure. Tariffs have gone up and down, importers have brought in goods early to avoid rate hikes, and the amount of goods coming into West Coast ports has gone up and down. Long Beach has been able to keep flows stable and avoid heavy traffic even though things are always changing.

Here are some useful tips based on current customs:

Don’t wait until the last minute to work on HS classification. The right HS codes affect duty rates, who can get special tariffs, and the risk of anti-dumping or countervailing taxes. Industry recommendations on U.S. imports say that misclassification is one of the most common—and expensive—reasons for rework and audits.

Be honest about the declared value. It could be tempting to understate the amount of your commercial invoice, but CBP analyzes claimed prices with statistical norms and past imports. You could have to take value-related tests and be checked after you enter if the numbers look off. In the long term, it’s wiser to keep invoice values in line with real transaction pricing and properly write down any discounts.

Keep track of your supplier data. A lot of late or wrong ISFs and entries arise from messy supplier master data, like factory names that aren’t always the same, different English spellings of the same address, and old connections. Making a clear database of your Chinese factories and trading partners makes it much less likely that you’ll make little but risky mistakes when you file. Recent ISF practice guides for online sellers stress the importance of making sure that their PO systems, supplier information, and warehouse receiving systems all work together to avoid problems.

Plan for changes in tariffs and volume. Reports say that importers sometimes rush freight into Southern California before tariffs go up, then slow down a lot after that.It’s a good idea to make reservations ahead of time, lock in truck space, and file entries early if you know that a tariff change or demand spike is approaching. This will help you avoid getting stuck in a sudden wave of last-minute shipments all arriving at Long Beach at the same time.

Lastly, think of customs as a process instead than an event. Instead of saying, “We’ll worry about customs when the cargo gets here,” make sure that your product development, purchasing, and supplier onboarding all follow the rules. Things move faster in Long Beach the more “right-first-time” your data is in China.

7. FCL vs LCL for Long Beach: which makes more sense?

Moving full-container-load (FCL) or less-than-container-load (LCL) goods into Long Beach has both cost and customs effects.

When you use FCL, your items are the only things in the container. That means that the paperwork for the invoice, packing list, and contents of the container is easier to line up, and inspections usually go more smoothly. If CBP needs to open the container, you won’t have to worry about another shipper’s inadequately documented products slowing you down. FCL is usually the best option for mid- to large-volume e-commerce and wholesale shipments if the numbers make it worth it.

When you choose LCL, your items share a container with other shippers. This makes it cheaper for little and medium-sized shipments to go where they need to go, especially if you can’t fill a whole 20′ or 40′ container. At the same time, LCL makes things more complicated by adding more people to the chain, more sources of documentation, and more chances for data to be mismatched. Some 2025 LCL instructions say that ISF needs to know exactly where the consolidator is and where the containers are being stuffed when more than one shipper shares a box.

The laws for customs don’t vary much between FCL and LCL, but your risk profile varies. If a co-loader or another shipper in your combined container doesn’t have good paperwork, the whole container could be delayed at Long Beach, and your shipment will have to wait with everyone else. That’s why a lot of importers move from LCL to FCL as soon as they can.

8. How Topway Shipping keeps your Long Beach shipments compliant and on-time

It can be hard to handle all of the above on your own, especially if your main business is marketing and selling products, not logistics.

This is where a company like Topway Shipping comes in.

Topway Shipping has been based in Shenzhen since 2010 and has concentrated on logistics for cross-border e-commerce and trade between China and the U.S. flowing from the start. The founding team has more than 15 years of real-world experience in international logistics and customs clearance, with a lot of knowledge in shipments going from Chinese production centers to the U.S. Ports on the West Coast, such Long Beach.

Topway Shipping can handle the whole logistics chain, not simply give you a freight rate:

From the first leg of transportation in China, we handle factory pick-ups, combining goods, and export customs clearance so that your commercial invoice, packing list, and export declarations are all in sync from the start.

Offering flexible FCL and LCL solutions from major Chinese ports to Long Beach and other important gateways across the world by ocean freight to major U.S. ports. This includes making sure that ISF filings are correct and on time and that the information on the bill of lading matches the information in your business records.

Into international warehousing and last-mile delivery: employing overseas warehouses to store inventory closer to your customers and connecting to last-mile networks for e-commerce deliveries throughout the U.S. This is especially helpful if Long Beach is your main entrance point and you need to get things out quickly to the Western and Central states.

And during customs clearance: using a detailed understanding of CBP expectations, Long Beach terminal operations, and recent tariff changes to lower the risk of holds and respond quickly if your package is chosen for inspection.

Topway Shipping can assist standardize your paperwork and data because it works at all of these stages. Instead of having one person make the commercial invoice, another perform ISF, another file customs entries, and yet another book trucks, a single integrated vendor can maintain information consistent from Shenzhen all the way to your U.S. warehouse door.

Conclusion

Shipping from China to Long Beach has never been more crucial for business, yet it has never been harder to follow the rules of paperwork and customs. The physical part of the supply chain, like ships, cranes, and terminals, is operating quite well. Long Beach handled record amounts of containers in 2025 without severe delays, and it plans to handle even more in the next few decades.

But for a lot of importers, the real problem is the paperwork. A shipment can travel thousands of kilometers across the Pacific on time, yet it may have to sit because an ISF was filed late, an HS code was inaccurate, or the commercial invoice didn’t match the packing list. Every document—from the first pro forma invoice and ISF submission to the bill of lading, arrival notice and customs entry—plays a specific role in convincing CBP and the terminal that your cargo is safe, correctly valued and fully compliant.

The best Long Beach importers see paperwork as an important aspect of their business, not something they undertake on the side. They clean up supplier data, put money into precise HS categorization, make sure their invoicing and packing lists match what really happens in their business, and collaborate with logistical partners who know the latest CBP rules and port practices.

The way to make Long Beach shipments go more smoothly is the same whether you’re a growing e-commerce brand shipping a few pallets a month or a more established importer moving multiple FCLs each week: get the paperwork right early, keep the data consistent all the way from China to the U.S., and work with experienced partners like Topway Shipping who can handle the whole chain—first-leg, ocean, warehousing, customs clearance, and last mile—under one clear strategy.

Long Beach will no longer be a source of worry if you accomplish that. Instead, it will be what it should be: a stable, high-capacity entrance to your biggest market.

FAQs

Q: What are the absolutely essential documents for shipping from China to Long Beach?
A: You will require at least a commercial invoice, a packing list, and a bill of lading for all maritime shipments. You also need Importer Security Filing (ISF 10+2) data, a customs bond linked to your importer of record number, and official customs entry documentation (CBP Forms 3461 and 7501) for goods coming into the U.S. You might also require certificates or approvals from the FDA, FCC, USDA, or CPSC, depending on what you’re selling.

Q: How early do I need to file ISF for a Long Beach shipment?
A: You have to register the ISF with CBP at least 24 hours before the container is put onto the ship in the foreign port, not 24 hours before it gets to the U.S. In real life, your freight forwarder or customs broker will normally set an internal cut-off earlier than that so they can review the data. Filing late can get you in trouble, even if your ship arrives on time.

Q: Does it really matter if my commercial invoice descriptions are vague?
A: Yes. Your commercial invoice helps CBP figure out the right HS code and duty rate and decide if your shipment looks fair. When you use general terms like “electronics” or “clothing” without giving information about the model, materials, or functions, people are more likely to ask inquiries or take tests. Customs can process your entry more swiftly if you give them clear, explicit descriptions and correct HS codes.

Q: Is FCL always better than LCL for Long Beach imports?
A: Yes. Your commercial invoice helps CBP figure out the right HS code and duty rate and decide if your shipment looks fair. When you use general terms like “electronics” or “clothing” without giving information about the model, materials, or functions, people are more likely to ask inquiries or take tests. Customs can process your entry more swiftly if you give them clear, explicit descriptions and correct HS codes.

Q: How can a logistics provider like Topway Shipping help with customs compliance?
A: An experienced provider can standardize your paperwork, handle ISF and customs entries, and work with carriers, terminals, and truckers to make sure that data stays the same from the point of origin to the point of delivery. For the United States and China When you send things to Long Beach, this usually involves helping you write invoices and packing lists, file ISFs on time, make full entry packets for CBP, and respond fast if an exam or hold happens. This cuts down on delays, stops penalties that may be avoided, and maintains your supply chain stable.