Transpacific (North Pacific)
A great-circle route across the North Pacific, exposed to hurricane-force winter storms from October to April.
North America · sea freight from Xiamen
Xiamen to Stockton
Taiwan Strait · East China Sea · North Pacific
Lithium batteries for Stockton go out of Xiamen's Haicang and Songyu terminals on the Taiwan Strait. On the way they face a North Pacific corridor with no canal or chokepoint, and they arrive at the port of Stockton.
The US side starts with two filings due before loading and ends with a road leg that must carry a live emergency number. The 6 points below are particular to this lane; each comes with what we do and the paperwork it touches.
What we need to start
Route profile
A great-circle route across the North Pacific, exposed to hurricane-force winter storms from October to April.
A duty line set by the exact 8507.60 code, lithium supply-chain questions under UFLPA, and ISF and AMS filings that are due before the box is loaded.


Where this route gets difficult
Listed from loading in Xiamen to import into United States, each with what we do about it.
Ships leaving Xiamen enter the Taiwan Strait straight away. A Chinese government weather account notes that the strait's funnel effect makes winds 1–2 Beaufort levels stronger than outside it, and that the winter and spring north-east monsoon brings force 7 or stronger winds on about two-thirds of days. Container ships are advised to secure lashing.
What Anxin does: From October to April we apply the CINS blocking and bracing checks strictly on stuffing photos before sealing.
Xiamen MSA offers pre-review of key DG documents, a pre-loading meeting at which ship, cargo owner, terminal and agent agree deck stowage and emergency measures, and a 'one ship, one plan' checklist from gate-in to sailing. In June 2026 it reported 104 energy-storage containers of 36 tonnes each loaded for Houston on a multipurpose ship.
What Anxin does: We send the key documents for pre-review before the formal filing and bring the stowage and emergency details the meeting will ask for.
From Xiamen the drawn corridor to Stockton 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.
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 Xiamen, ahead of the vessel's loading window.
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 Stockton 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.
Since 1 January 2026 California SB 1271 bars distributing or selling an e-bike, powered mobility device or its storage battery unless the battery has been tested by an accredited laboratory to a standard referenced in UL 2849 or EN 15194, and the laboratory's logo and the test standard are displayed. Importers must hand over the test report on request.
What Anxin does: For e-mobility batteries arriving at Stockton for the California market, we ask for the accredited test report and label photos before booking.

Documents & compliance
These documents come from the shipper, the manufacturer and the importer. Anxin checks them against each other; it does not issue test reports, safety data sheets or import certificates.

We line up UN numbers, model names and package counts across the Xiamen 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 Stockton.
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 | Where | Mitigation | Who acts |
|---|---|---|---|
| Cargo shift in winter monsoon seas | Taiwan Strait, Oct–Apr | CINS blocking and bracing checked on photos | Packing site, checked by Anxin |
| Stack collapse or cargo shift in a North Pacific storm | Mid-Pacific | Blocking and bracing checked before sealing; complete DG data for incident response | Packing site / carrier, checked by Anxin |
| Late or inaccurate ISF | Before loading abroad | Stuffing and consolidator data sent to the ISF filer immediately after packing | Anxin with the ISF filer |
Questions
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.
For products that pass automatic pre-review, Xiamen Customs issues it through the single window; the case reported in August 2026 took about 10 minutes, against about half a day for the old on-site inspection. Products that do not pass pre-review still need inspection.
References
Next step
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We check carrier acceptance for Xiamen → Stockton before any booking, and ask for missing battery documents first.
All destinations from Xiamen · United States ports

Share the cargo facts; we review the route in writing.
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