How to Avoid Pitfalls in Importing New Materials? Practical Guide from Shanghai Customs Brokers

Importing new materials remains a "deep-water zone" of customs supervision in the 2026 trade environment.Such goods often involve complex chemical compositions,unspecified HS code classifications,and strict environmental and safety standards.Many enterprises experience cargo detention at Shanghai Yangshan Port or Waigaoqiao Port due to inadequate document preparation,incurring high container detention fees and declaration delay fines.As a practical player with 20 years of experience at Shanghai ports,Zhongshitong will skip vague theories today and directly break down the core pain points and practical operations in new material imports.

Accurate Classification: Break Through the "First Gate" of Customs Clearance for New Materials

The first priority of customs inspection for new materials is HS code classification.This is the cornerstone of the entire customs clearance process,directly determining tax rates,supervision conditions,and whether legal inspection is required.Many new materials,especially modified plastics,polymer composites,or special alloys,often do not have fully corresponding product descriptions in the Import and Export Tariff.

In practice,the most common mistake enterprises make is directly applying the foreign codes provided by suppliers.China’s customs classification principles differ from those in Europe and the US,and blind application can easily trigger classification doubts.Once flagged by the system risk control,the cargo will be transferred to the manual inspection channel,extending customs clearance time by 3 to 5 working days.The correct approach is to provide detailed composition reports,physical and chemical property descriptions,and usage instructions before shipment.We need to conduct pre-classification based on the General Rules for Classification to ensure that the declaration elements fully match the actual "identity" of the goods.Especially for multi-functional composite materials,their "basic characteristics" must be confirmed to avoid risks of supplementary tax payment or even administrative penalties caused by classification deviations.

Customs Valuation: Practical Strategies to Respond to "Price Doubts"

New materials usually have high technological added value,and there is a lack of comparable domestic prices,making them a key focus of customs valuation departments.In 2026,the customs big data risk control system will conduct stricter reviews on the authenticity of "transaction prices".If the declared price is lower than the risk price line of similar products of the same model in the same period,or if there is a special relationship between the buyer and seller (such as parent-subsidiary companies,related trade),the customs will most likely initiate a price query.

Facing such queries,simply providing pro forma invoices (PI) or contracts is far from enough.We need to build a complete "price proof chain",including payment vouchers,insurance policies,freight documents,and the core foreign exchange payment records.If royalty fees or after-sales technical support fees are involved,they must be declared truthfully,and never try to hide them through "secondary packaging" channels.In past operation cases,we assisted a Suzhou enterprise in importing special industrial membranes.When the customs questioned that the patent fees had not been taxed,we successfully argued on the grounds of "not included in the dutiable price" by providing detailed patent allocation agreements and royalty payment vouchers,helping the enterprise avoid millions in additional tax liabilities.

Commodity Inspection & Documents: Compliance Details Determine Success or Failure

If new materials involve chemical properties,the complexity of the commodity inspection link will increase exponentially.First,it is necessary to confirm whether the goods are hazardous chemicals.According to the newly implemented Regulations on Safety Management of Hazardous Chemicals and related announcements in 2026,as long as the goods are included in the Catalogue of Hazardous Chemicals or meet the definition of hazardous chemicals after identification,regardless of whether their CAS numbers are listed,they must be declared in accordance with hazardous chemical requirements.

This requires enterprises to provide compliant MSDS (Material Safety Data Sheet) and public labels before shipment.Many foreign suppliers provide outdated MSDS versions or ones that do not meet the mandatory requirements of China’s GB standards,which will prevent the goods from being inspected after arrival at the port.Zhongshitong usually recommends sending the MSDS draft to a professional domestic testing institution for pre-review before shipment to ensure that the 14th item of transportation information is accurate.In addition,for sensitive materials requiring a "License for Import of Dual-Use Items and Technologies",such as specific carbon fibers or precursors,the license must be applied to the Ministry of Commerce in advance.Remember,the license must be "one license per shipment",and the verified quantity must strictly match the quantity on the bill of lading.Any over or short shipment may cause the license to become invalid and prevent customs clearance.

Core Document Audit Checklist

• Composition Description: Must include percentage content,avoid ambiguous terms such as "balance","etc."
• MSDS Report: Confirm version number and preparation date to ensure compliance with China’s GB/T 16483 standard.
• Hazard Public Label: Must have Chinese warning instructions,and the GHS label pattern must be clearly identifiable.
• Certificate of Origin: If involving RCEP or free trade agreements,confirm the direct transport rules and non-reprocessing certificate to enjoy tariff preferences.
• Contract & Invoice: Trade terms (such as EXW,FOB,CIF) must match the actual logistics route to avoid logical loopholes.

Risk Warning: Hidden Costs & Time Efficiency Control

When importing new materials,enterprises must not only calculate tariff costs but also logistics costs.Since new materials often have special storage requirements,such as moisture-proof,light-proof or constant temperature,prolonged detention at the port will not only incur storage fees but also may lead to quality degradation of the goods.We need to be particularly vigilant about the hidden cost traps of document exchange fees and terminal handling charges (THC).Some shipping lines charge high document fees at the destination port,and this part of the cost should be clearly borne by the shipper before signing the transportation contract.

In addition,for goods requiring sampling and inspection,the timeliness of the commodity inspection process is the biggest uncertainty.Relying on the location advantage of Shanghai ports,Zhongshitong has established a rapid inspection channel with laboratories.For goods urgently needed for production,we will apply for "inspection rectification" in the supervised warehouse to ensure that the pickup cycle is shortened to the maximum extent while meeting supervision requirements.For example,at the end of last year,Mr.Sheng imported a batch of nanometer powder materials which were selected for inspection.We coordinated with customs inspectors to conduct sampling on Saturday overtime and arranged for the laboratory to open an expedited channel,compressing the original 7-working-day testing cycle to 3 days,successfully avoiding the customer’s production line shutdown due to material shortage.

Comparison of Import Supervision Parameters for New Materials in 2026

To more intuitively show the supervision differences of different types of new materials,we have organized the following operation parameter table.Enterprises can self-check document completeness in advance according to the table when preparing goods.

Importing new materials is a systematic project that allows no negligence.From pre-review of documents to on-site operation at ports,every link requires strict control by a professional team.With its global service network radiating from the Shanghai headquarters,Zhongshitong can control risks outside the country and provide the most solid support for your new material import business.