Shanghai Full Process Guide for Import Customs Declaration and Clearance Agency

Breakdown of Core Links of Import Customs Declaration and Clearance Agency

As a customs declaration agency with 20 years of in-depth operation at Shanghai Port,we have seen too many enterprises encounter pitfalls due to unfamiliarity with the process: Manager Ding’s machinery manufacturing company imported precision machine tools from Japan,and the tax rate jumped from 5% to 15% due to incorrectly filled HS code; a cosmetics company was inspected by customs and delayed customs clearance for 5 days because the "component proportion" was omitted from declaration elements.These cases all point to the same core problem: import customs declaration is a systematic work,and compliance details need to be controlled from the source.Zhongshitong helps enterprises avoid more than 90% of declaration risks through the mode of "customs policy interpretation + port resource linkage + global compliance risk control".

I.Customs Valuation: The Game Between Declared Value and Dutiable Value

Customs valuation is the "first pass" of import customs declaration.In 2026,preferential tariff policies among RCEP member states (such as Thailand and Australia) have stricter requirements for certificates of origin.Last year,Ms.Wan’s electronics enterprise imported chips from Singapore,and the authenticity of the transaction price was questioned because the declared price was lower than the customs "minimum price limit" standard.We assisted the enterprise in supplementing supporting materials such as "sales contract terms" and "third-party price evaluation report",and finally the customs approved the declared price,avoiding the loss of 30% supplementary tax payment.

Practical Pitfall Avoidance Tips: For imported equipment,it is necessary to check the "Customs Commodity Price Database" in advance,compare the declared prices of similar products in the past 3 months,and prevent inspection triggered by under-declaration.The newly added "big data valuation model" in 2026 has higher requirements for the integrity of declaration elements.For example,for equipment involving "brand + model + material",if any element is missing,the system will automatically mark it for targeted inspection.

II.Commodity Inspection Pre-review: From "Formal Compliance" to "Substantive Verification"

Commodity inspection pre-review is the key to avoiding inspection risks.Last year,a batch of coatings imported by a chemical enterprise was intercepted by commodity inspection at Shanghai Port because the MSDS document was not updated to the 2026 version and did not indicate the "content of restricted substances under EU REACH Regulation".The Zhongshitong team coordinated with the enterprise to complete the documents on the same day,and contacted the commodity inspection department for expedited processing,and finally completed the pre-review within 24 hours.Such cases of "inspection caused by outdated documents" account for 35% of the problems we handle.

• Mandatory Check List for General Cargo Enterprises: It is necessary to verify whether the "production batch number","production date" and "packaging specification" are consistent with the customs declaration form,so as to avoid commodity inspection rejection caused by batch confusion.
• Special Requirements for Hazardous Chemicals: In addition to MSDS,it is also necessary to confirm that the "hazard label number" fully matches the 2026 edition of the UN Recommendations on the Transport of Dangerous Goods,otherwise it may be deemed as "failure to declare in accordance with regulations".

III.Compliance Boundaries of Animal and Plant Quarantine and License Processing

Animal and plant quarantine involves products such as meat,seedlings and wood.It is necessary to confirm in advance whether they belong to the "Catalogue of Entry Animal and Plant Quarantine Approval".An agricultural product importer once had an entire batch of goods returned due to missing the "Entry Animal and Plant Quarantine License".The approval cycle for such licenses is long (average 7-10 working days),and the "electronic license system" was added in 2026,so electronic applications need to be submitted through the "Single Window" in advance.

In terms of import licenses (such as O Certificate,3C Certification),attention should be paid: in 2026,the 3C certification requirements for "medical device products" are stricter.In addition to product test reports,"medical device filing certificate" is also required.A medical device company was required by the customs to supplement the "clinical application scope description" because it only provided the "product quality test report",which delayed customs clearance for 48 hours.

IV.Hidden Costs and Risk Control System of Import Customs Declaration Agency

Many enterprises only pay attention to explicit costs,but ignore hidden costs.Zhongshitong has summarized the "four-quadrant model of customs clearance cost" through 20 years of practical operation,helping enterprises identify actual expenses:

In 2026,global trade barriers increase,and the "export control list" is updated frequently in Europe and the United States.For example,for precision instruments imported by a German customer,because "sensitive components" were added to the "export country control list",Zhongshitong’s agency team gave an early warning 2 weeks in advance through the "global compliance database",and assisted the enterprise in supplementing supporting documents to avoid the goods being intercepted.

V.2026 Practical Case of Import Customs Declaration Agency

Situation (S): A multinational enterprise imported a batch of lithium battery components from the United States.Due to "HS code classification error",the tax rate rose from 5% (ordinary batteries) to 15% (cobalt-containing lithium batteries),requiring a supplementary tax payment of 1.2 million yuan.

Task (T): Quickly correct classification errors and reduce losses.

Action (A): Zhongshitong’s agency team: ① Contact the US supplier to obtain the "product structure disassembly drawing"; ② Consult the 2026 Customs Commodity Classification Manual,and confirm that "cobalt content > 2%" needs to be classified under the tariff heading of "lithium-ion batteries"; ③ Supplement the "component analysis report" before declaration to show that the cobalt content meets the classification standards.

Result (R): The customs finally approved the classification adjustment,the supplementary tax amount was reduced to 80,000 yuan,and the goods completed customs clearance within 3 working days,avoiding port detention fees and exchange rate losses.

The above case confirms that the core value of import customs declaration agency is not only "completing customs declaration",but also "reducing compliance risks and hidden costs through professional capabilities".Relying on Shanghai Port resources and linking with 12 directly affiliated customs across the country,Zhongshitong can realize "declaration in different places,local release",and the agency network covering more than 30 countries around the world ensures seamless connection of documents.In 2026,we will continue to optimize the dual-track mode of "AI pre-review system + manual review" to provide more accurate customs declaration services for enterprises.