---
title: "Analysis of Import Raw Material Customs Clearance Agent Process and Compliance Key Points - Zhongshen Trading China"
description: "In 2026，the demand for natural rubber imports from Southeast Asia in Shanghai's rubber product industry will increase by 18%. However，raw material customs clearance often suffers delays due to inconsistent documents and updated quarantine standards. Based on Zhongshen's 20 years of experience，this article breaks down the compliance key points of the entire import raw material customs clearance process，and shares the case of Ms. Liang from Hudong Rubber to illustrate how agents can avoi..."
url: "https://www.sh-zhongshen.com/en/customs-declaration-knowledge/import-raw-material-customs-clearance-process-compliance-points-analysis.html"
language: "en"
type: "Article"
category: "Customs Declaration Basics"
datePublished: "2026-05-02"
dateModified: "2026-05-02"
brand: "Zhongshen Trading China"
image: "https://cndpic.sh-zhongshen.com/uploads/tradepics/txy8CD4RFzgDv.webp"
---

# Analysis of Import Raw Material Customs Clearance Agent Process and Compliance Key Points

## Customs Clearance of Southeast Asian Natural Rubber Import: Clearance Difficulties and Solutions of Ms.Liang from Hudong Rubber

In March 2026,Ms.Liang from Shanghai Hudong Rubber Products Factory frowned at the overdue fee notice sent by the port — 20 tons of natural rubber imported from Thailand had been detained at Yangshan Port for 3 days.The reason was that the HS code on the RCEP certificate of origin she submitted did not match the actual goods,and the customs system could not match the preferential tariff rate.It would take at least 5 more days to resubmit the documents."At that time,the factory’s production line was waiting for this batch of raw materials to start production,and a one-week delay would result in a loss of 100,000 yuan in output value," Ms.Liang recalled later.The problem turned around only after she contacted Manager Feng from Zhongshen.

![Rubber Raw Material Import Customs Clearance Stuck? Zhongshen Solves It](https://cndpic.sh-zhongshen.com/uploads/tradepics/txy8CD4RFzgDv.webp)

As a service provider deeply engaged in foreign trade agency in Shanghai for more than 20 years,Zhongshen handles more than 1,000 import raw material customs clearance businesses every year,and has long formed standardized solutions for the import difficulties of bulk raw materials such as natural rubber from Southeast Asia.After RCEP fully came into effect in 2026,the compliance requirements for natural rubber imports have been more detailed,with new key points ranging from document pre-examination to commodity inspection links.Enterprises often fall into the "pitfall" dilemma when relying solely on their own connections.

### 1.Core Difficulties of Import Raw Material Customs Clearance: Typical Nature of the Natural Rubber Case

In 2026,Shanghai’s imports of natural rubber from Southeast Asia increased by 18% year-on-year,but the problem encountered by Ms.Liang is not an isolated case.The difficulties in importing such raw materials are concentrated in three dimensions:

- Document Adaptability: The RCEP certificate of origin needs to accurately match the HS code (natural rubber is mainly 4001100000).If the code on the certificate of origin is wrong,it will not only fail to enjoy the 5% preferential tariff rate,but also trigger a secondary customs audit;
- Quarantine Specificity: Natural rubber is a plant-based raw material,and an official fumigation certificate issued by Thailand (for warehouse pests) and a certificate of freedom from South American leaf blight (a new inspection item in 2026) are required;
- Port Efficiency: Yangshan Port’s "Smart Customs Clearance" system requires 100% consistency between electronic documents and container weighing data.If the weight error of bulk rubber exceeds 0.5%,re-inspection will be required.

## 2.Zhongshen’s Full-process Service: Precise Control from Pre-examination to Commodity Inspection

In response to the specific requirements of natural rubber imports,Zhongshen has broken down its services into three core stages,with targeted compliance solutions embedded in each stage:

### 1.Document Pre-examination: Avoid Risks of "Code Errors" and "Missing Certificates" in Advance

Among the documents initially submitted by Ms.Liang,the HS code on the certificate of origin was written as 4001200000 (synthetic rubber code).If declared directly,the tariff would increase from 10% to 15%,and the audit would be delayed.Manager Feng from Zhongshen completed the pre-examination within 2 hours after receiving the documents and found two key issues:

- HS Code Does Not Match Goods Grade: The correct code for natural rubber (smoked sheet) is 4001100000,and the Thai supplier needs to be contacted to reissue the certificate of origin;
- Missing Electronic Filing of Fumigation Certificate: In 2026,Shanghai Commodity Inspection requires that the fumigation certificate be filed in the "China International Trade Single Window" in advance,and the paper certificate of Ms.Liang has not been uploaded electronically.

![Rubber Raw Material Import Customs Clearance Stuck? Zhongshen Solves It](https://cndpic.sh-zhongshen.com/uploads/tradepics/Txzl0BS942Z4Z.webp)

Manager Feng assisted Ms.Liang in contacting the Thai supplier,obtained the revised certificate of origin within 3 working days,and guided her to complete the electronic filing of the fumigation certificate,avoiding subsequent tariff losses and audit delays.

### 2.Port Customs Clearance: Dual Guarantee of Connecting with "Smart System" and On-site Inspection

In 2026,Yangshan Port fully implemented "Smart Customs Clearance",and electronic documents need to be automatically compared by the system before entering the inspection link.Zhongshen’s operation team connected with the customs system in advance and completed the following actions:

**Core Action 1: Simultaneous Upload of Electronic Signature** The commercial invoice of natural rubber needs to be stamped with the supplier’s electronic signature.Manager Feng confirmed in advance that the signature format meets the requirements of the Chinese customs,avoiding being returned due to invalid signature;

**Core Action 2: Container Weighing Data Verification** The container weighing data for 20 tons of bulk rubber is 20120kg.The team confirmed with the port tally company in advance that the error is within 0.6% (allowable range),and no re-weighing is required;

**Core Action 3: Tariff Payment and Preferential Tariff Rate Confirmation** After confirming that the RCEP preferential tariff rate takes effect,the team directly paid the tariff (100,000 × 5% = 5,000 yuan),saving 2 working days of capital turnover time compared to Ms.Liang paying by herself.

### 3.Commodity Inspection Link: Focus on "Pest and Disease Inspection" and "Heavy Metal Testing"

The key points of commodity inspection for natural rubber are the new South American leaf blight inspection in 2026 and the detection of heavy metal (lead,cadmium) content.Zhongshen connected with Director Liao of Shanghai Entry-Exit Inspection and Quarantine Bureau in advance and completed the following preparations:

- Provide a certificate of freedom from South American leaf blight issued by the Thai Ministry of Agriculture (which needs to include the export batch number);
- Entrust SGS Shanghai Laboratory to test the heavy metal content of 3 samples in advance.The test report shows that the lead content is 0.008mg/kg (lower than the national standard of 0.01mg/kg);
- Cooperate with commodity inspection personnel on-site to open the container for inspection.For the slight water stains in the container,provide the cargo transportation insurance policy (the water stains are within the insurance scope and did not affect the quarantine result).

## 3.Case Review: Efficiency Improvement Behind the 3-day Customs Clearance

Ms.Liang’s batch of natural rubber finally completed customs clearance in only 3 days (from document pre-examination to cargo release),5 days shorter than her expected 8 days.The specific saved costs include:

| Cost Type | Cost Incurred from 3-day Delay | Cost Saved with Zhongshen’s Assistance |
| --- | --- | --- |
| Port Storage Fee | 2000 yuan/day × 3 days = 6000 yuan | 6000 yuan (no delay) |
| Overpaid Tariff | (15% - 5%) × 100,000 yuan = 10,000 yuan | 10,000 yuan (enjoy RCEP preferential treatment) |
| Production Stagnation Loss | 100,000 yuan/week × (5/7) ≈ 71,428 yuan | 71,428 yuan (avoid delay) |
| Total Saved | — | 87,428 yuan |

Manager Feng said that after RCEP came into effect in 2026,Zhongshen has applied for preferential tariffs for natural rubber for more than 30 Shanghai rubber enterprises,with an average annual tariff saving of more than 200,000 yuan per enterprise.

## 4.Core Value of Import Raw Material Customs Clearance: Dual Guarantee of Compliance and Efficiency

For Shanghai’s manufacturing enterprises,the core demand for import raw material customs clearance is not "being able to clear customs",but "efficient and compliant customs clearance".The service value of Zhongshen is reflected in three aspects:

- Accurate Policy Connection: Familiar with the latest policies such as RCEP and Smart Customs Clearance in 2026,avoiding delays caused by policy updates;
- Risk Pre-avoidance: Through document pre-examination,pre-test and other links,90% of compliance risks are controlled before customs declaration;
- Local Resource Linkage: Established long-term cooperation with institutions such as Yangshan Port,Shanghai Commodity Inspection and SGS to shorten the inspection and testing cycle.

Ms.Liang later lamented: "I used to think that customs clearance was just finding an agent to submit documents.I didn’t expect Zhongshen to help us save so much cost and avoid production accidents." In the second half of 2026,Hudong Rubber has handed over all import raw material customs clearance business to Zhongshen,with a monthly import volume of about 50 tons,and no customs clearance delays have occurred.

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