China Customs (GACC) processed over 60 million import and export declarations in 2025. The vast majority cleared without physical inspection. But for the shipments that did get held — delayed, flagged, or inspected — the root cause was almost always the same: incomplete or incorrect documentation.

This guide walks through the clearance process from end to end, explaining what happens at each stage, what documents are required, and how to keep your shipments moving.

Overview of the Clearance Process

A typical customs clearance in China follows six stages:

  1. Document preparation — Before the goods arrive, all declaration documents must be compiled and verified
  2. Electronic pre-declaration — The customs broker submits an electronic declaration up to 7 days before arrival
  3. Risk assessment — GACC's system evaluates the declaration and assigns a clearance channel
  4. Channel outcome — Green (auto-release), Yellow (document review), or Red (physical inspection)
  5. Duty and tax payment — Import duties and VAT are assessed and paid
  6. Cargo release — Goods are released from the port or bonded area

Required Documents

The standard document package for a customs declaration includes:

  • Commercial invoice — Must include detailed product description, unit value, total value, currency, and terms of trade (Incoterms)
  • Packing list — Weight, dimensions, package count, and marks/numbers
  • Bill of lading or air waybill — Original or electronic
  • Sales contract — Between buyer and seller
  • Customs declaration form — Prepared by the licensed customs broker
  • Certificate of origin — If claiming preferential tariff treatment under a free trade agreement
  • Import/export license — For controlled or restricted goods
  • Inspection certificates — For goods subject to CIQ inspection (food, cosmetics, certain machinery)

Risk Assessment and Clearance Channels

When the electronic declaration is received, GACC's risk management system evaluates it against hundreds of parameters — including HS code, declared value, country of origin, exporter/importer history, and commodity-specific risk indicators. The system assigns one of three outcomes:

  • Green Channel (Auto-Release) — Approximately 70% of declarations. Goods are released without any manual intervention. Clearance in under 4 hours from vessel docking.
  • Yellow Channel (Document Review) — 15–20% of declarations. A customs officer reviews the documents electronically. Additional supporting documents may be requested. Clearance typically within 24–48 hours.
  • Red Channel (Physical Inspection) — 5–10% of declarations. The cargo is physically inspected by customs officers at the port. Inspection may include X-ray scanning, container opening, and/or sample testing. Clearance can take 2–7 days depending on complexity.

Importers and exporters with AEO (Authorised Economic Operator) certification and a clean compliance record are significantly more likely to receive Green Channel clearance. The recently expanded GACC paperless clearance program now covers an additional 1,200+ HS codes, further reducing inspection rates for qualifying shipments.

The Electronic Pre-Declaration Advantage

One of the most effective strategies for reducing clearance time is the electronic pre-declaration system. Under the current GACC framework, customs brokers can submit declarations up to 7 days before the vessel arrives at the Chinese port. This allows the risk assessment to be completed while the cargo is still in transit. By the time the vessel docks, the clearance channel outcome is already known, and in the case of Green Channel clearance, the cargo can be released within hours of unloading.

Pre-declaration is available for both import and export shipments. For exports, the declaration can be submitted as soon as the cargo is loaded at the factory, further compressing the timeline from factory gate to vessel departure.

Duty and Tax Calculation

Import duties are calculated on the CIF value (cost, insurance, and freight) of the goods. The applicable duty rate depends on the HS code classification and country of origin. Additionally, import VAT is levied at rates of 13% (standard) or 9% (reduced, for certain goods).

Export customs clearance follows a similar process but is generally faster because export duties are limited to a small number of resource-based products. The primary purpose of export clearance is to verify the declaration for VAT rebate purposes.

Port-Specific Procedures

While the national customs framework is uniform, each major Chinese port operates with local variations in inspection procedures, appointment scheduling, and documentation handling. For example, Shanghai's Yangshan Deep Water Port processes the highest volume of containers in the world, with a dedicated customs team operating 24/7. Ningbo-Zhoushan Port, the world's largest by cargo throughput, has specialised inspection lanes for chemicals and bulk commodities. Shenzhen's Yantian Port handles the majority of Southern China's containerised exports with a highly automated clearance system. Understanding these port-specific nuances can significantly improve clearance predictability. Our team maintains dedicated customs desks at each of these ports, with staff who understand the local procedures and relationships with the on-site customs officers.

Post-Clearance Audit and Compliance

GACC operates a post-clearance audit system that reviews declarations after the goods have been released. Approximately 2–3% of declarations are selected for post-clearance audit each year. During an audit, customs reviews the original declaration against the supporting documentation, checks HS code classification accuracy, and verifies that valuation was correct. If discrepancies are found, penalties may be assessed and the importer or exporter's risk profile is adjusted, increasing the likelihood of future Red Channel inspections. Maintaining accurate records for the statutory five-year retention period is essential for surviving a post-clearance audit.

Common Causes of Delay

Based on our experience handling thousands of clearances annually, the most frequent delays arise from:

  • HS code misclassification — Incorrect or overly general HS codes trigger manual review almost every time
  • Value discrepancies — If the declared value differs significantly from GACC's reference price database, the shipment is flagged
  • Incomplete document sets — Missing certificates of origin, inspection certificates, or licenses
  • License and restriction issues — Goods subject to import/export controls without the required permits
  • Inspection appointment scheduling — At busy ports, physical inspection slots can be booked days in advance

Special Considerations for Importer of Record Arrangements

If you are using an Importer of Record (IOR) service — meaning a licensed Chinese entity clears customs on your behalf — the clearance process is identical in procedure, but the legal responsibility shifts to the IOR. The IOR's name appears on the declaration, and the IOR bears liability for accuracy and duty payment. This is why choosing a qualified IOR partner is critical: an error on the declaration is legally theirs, but operationally it delays your cargo.

How Zhongshen Manages Clearance

Our customs team handles every clearance from preparation to release. We maintain dedicated desks at all major Chinese ports (Shanghai, Ningbo, Shenzhen, Qingdao, Tianjin), with staff who work in shifts aligned with port operating hours. For clients with regular shipments, we maintain pre-approved document templates and HS classification records to reduce preparation time on each new shipment.