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North America · sea freight from Guangzhou

Shipping from Guangzhou to San Diego

Guangzhou to San Diego

South China Sea · Taiwan Strait · East China Sea · North Pacific

Sea corridor illustration: Guangzhou to San Diego, United States Simplified map with a curved corridor from Guangzhou via South China Sea, Taiwan Strait, East China Sea, North Pacific to San Diego. Illustration only; not a vessel track or schedule. CHINANORTH AMERICAPACIFIC OCEAN East China SeaNorth Pacific GuangzhouCHINA ORIGIN San DiegoUNITED STATES GuangzhouSOUTH CHINA SEAGUANGDONGDEPARTURE AREA
  1. GuangzhouChina origin
  2. South China Sea
  3. Taiwan Strait
  4. East China Sea
  5. North Pacific
  6. San DiegoUnited States
Geographic corridor illustration only, not a vessel track, port-call list or sailing schedule. The loading terminal, carrier, transshipment and dates are confirmed per shipment.

Lithium batteries for San Diego go out of Nansha, at the mouth of the Pearl River. On the way they face the open North Pacific, where weather is the main risk, and they arrive at the port of San Diego.

The US side starts with two filings due before loading and ends with a road leg that must carry a live emergency number. This page sets out 6 points specific to this route, how Anxin handles each one and which documents to prepare.

What we need to start

  • Nansha export
  • Dongguan–Nansha one-box
  • HTS code 8507.60
  • ISF filer
  • Supply-chain tracing file
Ask about this route United States ports from Guangzhou

Route profile

How Guangzhou → San Diego differs from other lanes

Sea corridor

Transpacific (North Pacific)

A great-circle route across the North Pacific, exposed to hurricane-force winter storms from October to April.

Import country

United States

US entry hinges on filings made in China (ISF and AMS), a traceable lithium supply chain and a road leg that is regulated as a hazmat move.

Elevated section of the Nansha Port Railway on concrete piers in Guangzhou's Nansha district
A loaded container ship on the horizon

Where this route gets difficult

6 points to plan for on the Guangzhou → San Diego route

In the order the cargo meets them: at the loading port, at sea, at San Diego and at customs in United States.

  1. 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.

  2. Origin port

    Nansha MSA's state-of-charge advice for energy storage

    At a July 2024 meeting on energy-storage carriage, Nansha MSA recommended shipping ESS batteries at a state of charge of around 25% and preventing accidental activation. It is a recommendation rather than a fixed rule, but it is the figure the local authority has put on record.

    What Anxin does: For ESS cargo leaving Nansha we ask the manufacturer to state the shipping state of charge and the anti-activation measures in writing, and put both in the documents the carrier sees.

  3. Sea corridor

    An open-ocean crossing where weather is the main risk

    From Guangzhou the drawn corridor to San Diego runs across the North Pacific without a canal or Red Sea passage, so weather replaces chokepoints as the risk. The ONE Apus, bound from Yantian to Long Beach in November 2020, had a stack collapse in a storm about 1,600 nautical miles north-west of Hawaii; her owners said more than 1,900 containers could be lost or damaged, up to 40 of them hazmat.

    What Anxin does: For winter sailings especially, we review blocking and bracing on stuffing photos against the CINS points before sealing, and make sure the DG declaration is complete, so a damaged box can be identified and handled correctly.

  4. Import country

    The emergency response number has to be answered live

    US rules want a numeric emergency response telephone number on the shipping paper for battery cargo that leaves San Diego by road, monitored for as long as the goods are in transport and answered by a person with the emergency information for UN3480 or UN3090. A call-back service fails the test (49 CFR 172.604); only the IMDG waiver for cargo that never touches a public highway avoids it.

    What Anxin does: Before sailing we confirm who provides the 24-hour number for the US leg, usually the importer's emergency response provider, and put it with the contract reference on the DG documents we send to the trucker.

  5. Import country

    ISF closes 24 hours before loading in Guangzhou

    The Importer Security Filing must reach CBP no later than 24 hours before the container is laden aboard the vessel abroad. CBP's liquidated damages guidelines provide for a claim per violation for late, inaccurate or incomplete filings. Two of the data elements, the container stuffing location and the consolidator, only exist once the box is packed.

    What Anxin does: We send the importer's ISF filer the stuffing location, consolidator and manufacturer details as soon as the container is packed in Guangzhou, ahead of the vessel's loading window.

  6. Import country

    California's battery-embedded product rules since January 2026

    Under California SB 1215, consumers have paid a recycling fee on covered battery-embedded products since 1 January 2026, and those products must be labelled with the maker's name or brand and the battery chemistry, or give that information on the maker's website. Manufacturers must also list covered and exempt products in an annual notice to retailers and CalRecycle.

    What Anxin does: If the goods landing at San Diego are devices with built-in batteries for sale in California, we ask the brand owner to confirm the chemistry labelling and the CalRecycle notice before shipping.

Locator map of San Diego, United StatesSan Diego
Locator map in the same projection as the corridor map; the dot marks the listed port position (32.72°N, 117.18°W).
Containers on rail wagons next to a terminal in Vancouver

Documents & compliance

Checklist for Guangzhou → San Diego

Anxin reviews documents supplied by the shipper, manufacturer and importer; it does not issue test reports, safety data sheets or import certificates.

At the Guangzhou end

  • Packaging certificate and MSA cargo report cross-checked line by line (UN number, packaging code, quantity)
  • For ESS: written shipping state of charge and anti-activation measures from the manufacturer
  • Transport-condition classification report where applicable
  • 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

For the carrier and the voyage

  • Stuffing photos before, during and after packing, checked for blocking and bracing
  • UN 38.3 test summary for every cell and battery type
  • Dangerous goods declaration with UN number (3480 / 3481 / 3090 / 3091), proper shipping name and packing instruction (P903, or P908/P911 for damaged)

For import into United States

  • ISF filer named; stuffing location and consolidator sent right after packing
  • Importer of record and the licensed customs broker who will file the entry
  • HTSUS classification from the broker (8507.60.0010 vs .0020 decides the Section 301 line)
Two power-tool battery packs side by side
Before you book

Match the details first

We line up UN numbers, model names and package counts across the Guangzhou filings, the booking with the carrier and the documents for United States before the booking is confirmed, so that a mismatch is fixed at origin rather than discovered at San Diego.

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

Risk table for Guangzhou → San Diego

RiskWhereMitigationWho acts
Mismatch between packaging certificate and MSA filing flagged by shared dataDongguan / NanshaLine-by-line check before submissionAnxin with the declarant
Stack collapse or cargo shift in a North Pacific stormMid-PacificBlocking and bracing checked before sealing; complete DG data for incident responsePacking site / carrier, checked by Anxin
Late or inaccurate ISFBefore loading abroadStuffing and consolidator data sent to the ISF filer immediately after packingAnxin with the ISF filer
Truck stopped without a monitored emergency numberRoad leg from the portEmergency response provider confirmed before sailingImporter, checked by Anxin

Questions

Common questions on the Guangzhou → San Diego route

For lithium-ion batteries classified in HTSUS 8507.60.0020 and entered from 1 January 2026, USTR set the Section 301 additional duty at 25%; EV traction batteries in 8507.60.0010 have been at 25% since 2024. Other duties can apply on top. The importer's customs broker confirms the classification and total duty; we make sure the invoice gives the broker enough detail to do so.

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.

Nansha MSA has recommended around 25% for ESS batteries and measures against accidental activation. Treat it as the local authority's recommendation; the carrier's own acceptance conditions also apply.

References

Regulations and port sources cited

  1. 19 CFR 134.11: Country of origin marking required (Legal Information Institute (e-CFR text))
  2. 19 CFR 149.2 – Importer security filing: requirement and time of transmission (eCFR / CBP)
  3. Section 301 Modifications Determination (Federal Register notice, Sept 2024) (Office of the U.S. Trade Representative)
  4. 49 CFR 171.25 – Additional requirements for the use of the IMDG Code (eCFR / PHMSA)
  5. 49 CFR 172.604: Emergency response telephone number (eCFR / PHMSA)
  6. Hurricane force extratropical cyclones observed using QuikSCAT (Mariners Weather Log 49-1) (NOAA Ocean Prediction Center)
  7. Container ship ONE Apus; North Pacific Ocean (incident record) (NOAA IncidentNews)
  8. Nansha MSA meeting on the safe carriage of energy-storage batteries (Guangzhou Nansha District Government)
  9. Export dangerous goods packaging inspection: service guide (Chinese) (General Administration of Customs of China (Lanzhou Customs service guide))

Next step

From enquiry to import

  1. 1EnquiryCargo, origin, destination
  2. 2Documents checkUN 38.3, SDS, packing
  3. 3BookingAfter carrier acceptance
  4. 4HandoverAt Guangzhou
  5. 5ImportClearance at San Diego
Each step is confirmed in writing; an enquiry does not create a booking.

Ask about Guangzhou → San Diego

Origin and destination are filled in; add the cargo facts you have.

Sending this form starts a review; it does not confirm carriage. Full enquiry form

After you send it

We check carrier acceptance for Guangzhou → San Diego before any booking, and ask for missing battery documents first.

All destinations from Guangzhou · United States ports

A truck hauling a teal shipping container on a motorway

Need Guangzhou → San Diego reviewed?

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