Guangzhou (Nansha)
Pearl River Delta battery cargo through Nansha, where a September 2026 agreement lets Dongguan-inspected containers load without a second MSA check, and where typhoon season runs June to October.
North America · sea freight from Guangzhou
Shipping from Guangzhou to San Francisco
Guangzhou to San Francisco
South China Sea · Taiwan Strait · East China Sea · North Pacific
- GuangzhouChina origin
- South China Sea
- Taiwan Strait
- East China Sea
- North Pacific
- San FranciscoUnited States
Lithium batteries for San Francisco go from the Pearl River Delta via Nansha. On the way they face the open North Pacific, where weather is the main risk, and they arrive at the port of San Francisco.
San Francisco means US customs filings that are due while the container is still in Guangzhou, and a supply chain CBP may ask to see. The 5 points below are particular to this lane; each comes with what we do and the paperwork it touches.
What we need to start
- Dongguan–Nansha one-box
- Typhoon season Jun–Oct
- ISF filer
- Supply-chain tracing file
- HTS code 8507.60
Route profile
What sets Guangzhou → San Francisco apart
Transpacific (North Pacific)
A North Pacific crossing with no canal or chokepoint risk, but with a record of winter storms strong enough to collapse container stacks.
Where this route gets difficult
5 pain points from Guangzhou to San Francisco
Loading port first, then the sea leg, then San Francisco and the United States market.
- Origin port
Dongguan factory to Nansha: the new one-box route
On 22 September 2026 Dongguan and Guangzhou MSA agreed to extend the one-box model to Nansha: Guangzhou MSA recognises Dongguan MSA's factory inspection and does not re-inspect unless necessary. The first box was stuffed in Dongguan that day and sailed from Nansha to Singapore on 24 September. The model is new at Nansha, so the factory record has to be right first time.
What Anxin does: We ask at booking whether your Dongguan factory can use the Nansha one-box arrangement and make sure the stuffing photos, packing certificate and DG declaration match, because a mismatch is the 'necessary' case that brings the second inspection back.
- Origin port
Customs and MSA now compare packaging certificates
In September 2026 Dongguan Customs and Dongguan MSA started sharing dangerous-goods packaging certificate data, described as a first in China, together with joint action against concealed and false declarations; Huangpu Customs also runs a joint 'lithium batteries going overseas' service against misdeclaration. A packaging certificate that does not match the MSA filing is now visible to both agencies.
What Anxin does: We check that the UN number, packaging code and quantities on the packaging certificate are exactly those on the MSA cargo report before either is submitted.
- Sea corridor
Hurricane-force winter storms, October to April
NOAA's Ocean Prediction Center has recorded hurricane-force winds (64 knots or more) in mid-latitude North Pacific storms in every month from October to April, most often in December, with 15 to 23 such storms a season in its 2001–2004 study. These are not tropical systems, so they arrive outside typhoon season.
What Anxin does: For October–April sailings we check blocking and bracing on stuffing photos before sealing and confirm the full DG data are on the manifest.
- Import country
AMS: the manifest CBP sees before the ship leaves Guangzhou
Under 19 CFR 4.7 the carrier's cargo declaration must be in CBP's Automated Manifest System 24 hours before loading abroad. Without it, or with inaccurate data, the permit to unlade the container at San Francisco can be delayed or refused.
What Anxin does: We give the carrier or NVOCC the final cargo description, HS code, UN number and package count before the documentation cut-off in Guangzhou, so the AMS filing and the DG manifest say the same thing.
- Import country
Demurrage and detention invoices must follow FMC rules
Battery containers held for DG checks or paperwork can run up demurrage and detention at San Francisco. Under the FMC's billing rule, in force since May 2024, carriers and terminals must invoice within 30 days with accurate, complete information, or the charge is not payable, and the billed party has at least 30 days to ask for a waiver or refund. A 2025 court ruling set aside only the section on who may be billed.
What Anxin does: We keep the dates of discharge, availability and any DG hold for each container, so the importer can check invoices against them and dispute charges inside the FMC time limits.
Documents & compliance
Documents to line up for Guangzhou → San Francisco
Test reports, safety data sheets and import certificates come from the shipper, factory and importer, not from Anxin; our part is to review them before booking.
In Guangzhou, before the box is loaded
- Packaging certificate and MSA cargo report cross-checked line by line (UN number, packaging code, quantity)
- Load plan showing even weight distribution (no more than 60% of the cargo weight in either half of the container length)
- 'Made in China' marking on articles or containers checked on photos
- Safety data sheet and dangerous goods safe-carriage declaration for the MSA cargo report
- Customs packaging use-appraisal result for the dangerous goods packaging (with the maker's performance appraisal)
Carrier and voyage
- Stuffing photos before, during and after packing, checked for blocking and bracing
- Dangerous goods declaration with UN number (3480 / 3481 / 3090 / 3091), proper shipping name and packing instruction (P903, or P908/P911 for damaged)
- Lithium battery mark (SP188 cargo) or class 9 labels and placards
For import into United States
- 24-hour emergency response number (and provider reference) for the US road leg
- Importer of record and the licensed customs broker who will file the entry
Before you book
Send the file once, complete
Most delays on this route start with a document that exists but does not match: a UN number, a model name or a package count that differs between the Guangzhou filings, the carrier booking and the United States import file. We check the three against each other before the booking is confirmed.
Carriers we book with
Our booking panel; availability on this lane and acceptance of the declared UN numbers are confirmed for each booking. It does not mean that a listed carrier runs a direct service on this route. Carrier choice depends on the trade lane, cargo classification and each carrier's dangerous-goods acceptance at booking. The final carrier is confirmed on the booking.
Risk & mitigation
Risks on this route and who deals with them
| Risk | Where | Mitigation | Who acts |
|---|---|---|---|
| Mismatch between packaging certificate and MSA filing flagged by shared data | Dongguan / Nansha | Line-by-line check before submission | Anxin with the declarant |
| Second inspection at Nansha because factory records are incomplete | Dongguan factory → Nansha | Photos, packing certificate and declaration matched before trucking | Anxin |
| Heavy-weather damage in a winter storm | North Pacific, Oct–Apr | CINS stuffing checks | Packing site, checked by Anxin |
| Permit to unlade delayed for a late or inaccurate AMS manifest | Port of discharge | Final cargo data given to the carrier before the cut-off | Carrier / NVOCC, with data from Anxin |
Questions
Guangzhou → San Francisco: questions we are asked
Yes. Under 49 CFR 171.25(b)(3), SP188 packages of UN3480 or UN3090 need the 'FORBIDDEN FOR TRANSPORT ABOARD PASSENGER AIRCRAFT' marking or a Cargo Aircraft Only label, and so do packages of batteries packed with or contained in equipment above 5 kg net. We check for it on carton photos before stuffing.
Weather is the main risk on this crossing: NOAA recorded hurricane-force North Pacific storms from October to April, most often in December. We tighten the packing checks for those sailings.
Both now have a one-box arrangement with Dongguan MSA: Yantian since May 2026 and Nansha since 22 September 2026, so a container inspected at the factory need not be reopened at the terminal unless necessary. The choice then comes down to the carrier's service to your destination and the cut-offs; we compare both when you book.
References
Where these points come from
- 19 CFR 134.11: Country of origin marking required (Legal Information Institute (e-CFR text))
- 19 CFR 4.7: inward foreign manifest; advance filing of cargo declaration (24 hours before lading) (Legal Information Institute (e-CFR text))
- 49 CFR 171.25 – Additional requirements for the use of the IMDG Code (eCFR / PHMSA)
- 49 CFR 172.604: Emergency response telephone number (eCFR / PHMSA)
- Hurricane force extratropical cyclones observed using QuikSCAT (Mariners Weather Log 49-1) (NOAA Ocean Prediction Center)
- Export dangerous goods packaging inspection: service guide (Chinese) (General Administration of Customs of China (Lanzhou Customs service guide))
Next step
From enquiry to import
- 1EnquiryCargo, origin, destination
- 2Documents checkUN 38.3, SDS, packing
- 3BookingAfter carrier acceptance
- 4HandoverAt Guangzhou
- 5ImportClearance at San Francisco
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After you send it
We check carrier acceptance for Guangzhou → San Francisco before any booking, and ask for missing battery documents first.
All destinations from Guangzhou · United States ports
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