---
title: "Chongqing Original Import Chitosan Oligosaccharide Agency, Full-process Compliance Customs Clearance Service - Zhongshen Trading China"
description: "By 2026，demand for original imported chitosan oligosaccharide in Chongqing's biomedical industry has grown by 32%，but imports face challenges such as origin quarantine and document consistency. Zhongshen，focusing on core links，helps enterprises complete imports efficiently and avoid compliance risks through process optimization such as document pre-examination and port customs declaration.。"
url: "https://www.sh-zhongshen.com/en/customs-declaration-knowledge/chongqing-import-chitosan-oligosaccharide-agent-full-process-service.html"
language: "en"
type: "Article"
category: "Customs Declaration Basics"
datePublished: "2026-06-17"
dateModified: "2026-06-17"
brand: "Zhongshen Trading China"
image: "https://cndpic.sh-zhongshen.com/uploads/tradepics/Gg59eUqgFEZ95.webp"
---

# Chongqing Original Import Chitosan Oligosaccharide Agency, Full-process Compliance Customs Clearance Service

## I.Import Background and Common Difficulties of Original Imported Chitosan Oligosaccharide in Chongqing

By 2026,demand for original imported chitosan oligosaccharide among enterprises engaged in functional food and agricultural adjuvant research and development in Chongqing Biomedical Industrial Park has increased by 32% year-on-year compared to 2025.This oligosaccharide extracted from shrimp and crab shells has become a core raw material for many enterprises due to its higher purity and stronger biological activity.However,many enterprises reported that when importing chitosan oligosaccharide from Japan and South Korea,they often get stuck in links such as "inconsistent origin quarantine certificates" and "discrepant document information",and even had goods detained due to failure to check the port access list in advance.

![Chongqing Original Import Chitosan Oligosaccharide Customs Clearance Difficulties? Agency Services Help Efficient Implementation](https://cndpic.sh-zhongshen.com/uploads/tradepics/Gg59eUqgFEZ95.webp)

Mr.Peng,general manager of a Chongqing biotechnology company,once tried to import a batch of Japanese-made chitosan oligosaccharide on his own.The "raw material traceability certificate" provided by the supplier only marked "Japanese waters" without clear longitude and latitude,which was returned by Chongqing Customs for supplementary materials,resulting in 5 days of port detention and nearly 2,000 yuan in container detention fees.Similar situations accounted for 18% of Chongqing import enterprises in the first half of 2026,with core pain points concentrated in "insufficient pre-compliance" and "poor process connection".

## II.Core Role of Zhongshen in Chitosan Oligosaccharide Import

As a service provider with over 20 years of experience in foreign trade agency,Zhongshen focuses on solving the two major pain points of "pre-compliance" and "process connection" for enterprises in Chongqing’s chitosan oligosaccharide import business.It locks in the special requirements of origin quarantine in advance,and connects the linkage links of documents,customs declaration and commodity inspection to avoid delaying the overall progress due to mistakes in a single link.Unlike general cargo agency,Zhongshen has set up a special service team for the "biological product attribute" of chitosan oligosaccharide,covering the entire process from pre-purchase consultation to goods warehousing.

## III.Stage Decomposition and Exclusive Services of Chitosan Oligosaccharide Import Process

Chitosan oligosaccharide belongs to "animal and plant-derived biological products".The import process has more links such as origin quarantine and component testing than general cargo.Zhongshen decomposes it into three key stages,and each stage designs exclusive services according to product characteristics:

### 1.Document Pre-examination: Avoid "Hidden Risks" of Origin Quarantine in Advance

In 2026,China’s origin quarantine requirements for imported chitosan oligosaccharide have added a "raw material source traceability certificate" in addition to the conventional "official quarantine certificate of the exporting country",which requires clear fishing waters of shrimp and crab shells and qualification of processing enterprises.Many Chongqing enterprises had their certificates returned by port commodity inspection because they did not notice this new requirement.

Manager Qiu from Zhongshen’s document department will check three core pieces of information before the enterprise signs the purchase contract:

![Chongqing Original Import Chitosan Oligosaccharide Agency, Full-process Compliance Customs Clearance Service](https://cndpic.sh-zhongshen.com/uploads/tradepics/GGkAyjoO2oOdP.webp)

- Whether the exporting country is included in China’s "List of Countries/Regions Allowed to Import Chitosan Oligosaccharide" (after the 2026 update,some enterprises in Hokkaido,Japan and Gyeongsangnam-do,South Korea are still within the scope of admission);
- Whether the "raw material traceability certificate" provided by the supplier includes details such as sea area longitude and latitude,fishing batch,etc.;
- Whether the product component test report meets the purity requirements of chitosan oligosaccharide in China’s "Food Additive Use Standard" (GB2760-2024) (≥90%).

In October last year,Mr.Peng’s company planned to import a batch of chitosan oligosaccharide from Japan.The traceability certificate provided by the supplier only marked "Japanese waters" without clear longitude and latitude.Manager Qiu reminded them to supplement the materials in advance,avoiding the loss of being unable to clear customs after the goods arrived at the port.

### 2.Port Customs Declaration: Accurately Match Customs Declaration Code for "Biological Products"

The customs declaration code for chitosan oligosaccharide is 3506919090,but some enterprises confuse "chitosan oligosaccharide" with "chitosan" and fill in the code incorrectly,resulting in customs declaration being returned.Zhongshen’s customs declaration team will first check the product’s "molecular weight distribution report" — the molecular weight of chitosan oligosaccharide is usually 500-2000Da,while chitosan has a higher molecular weight.It accurately matches the code through this report,and synchronizes the pre-declaration information of commodity inspection.

In addition,in 2026,Chongqing Customs implemented a "reservation inspection" system for imported biological products.Zhongshen will submit the pre-declaration 3 working days in advance according to the arrival time of the goods,and arrange a dedicated person to follow up the inspection progress.Mr.Peng’s company once tried to declare customs on its own,and the waiting time for inspection was as long as 7 days due to no prior reservation.However,through Zhongshen’s agency,the inspection was completed in only 2 days.

### 3.Commodity Inspection Link: Focus on Checking "Active Ingredient Stability"

The active ingredients of chitosan oligosaccharide are easily affected by temperature and humidity.In 2026,commodity inspection has added a "transportation temperature record check",which requires providing full-course temperature monitoring data in the container (which must be maintained at 15-25).Zhongshen will coordinate with international transportation parties to install GPS temperature monitoring equipment before the goods are shipped,and synchronize the monitoring plan to the commodity inspection department in advance.

In November last year,a batch of chitosan oligosaccharide imported from South Korea had a temperature fluctuation to 28during transportation.Zhongshen’s commodity inspection liaison contacted the commodity inspection laboratory in advance and provided a "test report on the impact of temperature fluctuation on active ingredients" (showing that the fluctuation did not exceed the allowable range),and finally passed the commodity inspection smoothly,avoiding delays caused by being required to retest the goods.

## IV.Self-Import vs.Zhongshen Agency: Efficiency Comparison of Key Links

| Comparison Dimension | Self-Import (Common Situation of Chongqing Enterprises) | Zhongshen Agency (2026 Service Data) |
| --- | --- | --- |
| Document Preparation Cycle | 15-20 working days | 7-10 working days |
| Port Clearance Time | 7-12 working days | 3-5 working days |
| Quarantine Inspection Pass Rate (First Declaration) | 75% | 98% |
| Additional Costs (Storage/Container Detention Fees) | Average 12,000 yuan per batch | Virtually No Additional Costs |
| Note | Some enterprises need to re-declare due to incorrect code,and the cycle is extended to 30 days | Pre-declaration + reservation inspection to compress the time of key links |

## V.3 Key Risk Tips for Chongqing Chitosan Oligosaccharide Import

Mr.Ji,foreign trade consultant of Zhongshen,summarized the common risks of Chongqing enterprises importing chitosan oligosaccharide in 2026 and reminded enterprises to pay attention to:

- Avoid selecting suppliers with "no admission qualification": some small processing enterprises are not included in China’s admission list,and even if the products are qualified,they cannot clear customs;
- Confirm the timeliness of the "component test report" in advance: the report must be within 6 months and issued by a third-party laboratory recognized by China;
- Transportation method selection: give priority to cold chain containers to avoid affecting product activity due to temperature fluctuations in ordinary containers.

## VI.Summary: Professional Agency Improves Import Efficiency and Compliance

In 2026,Chongqing’s demand for original imported chitosan oligosaccharide is still growing,but the compliance requirements in the import process are also becoming more detailed.Zhongshen helps enterprises solve difficulties such as origin quarantine,document matching and commodity inspection verification through the model of "pre-declaration + process linkage + dedicated person follow-up".It not only shortens the import cycle,but also avoids cargo detention or penalties caused by violations.For Chongqing’s biomedical enterprises,choosing a professional import agency can not only focus on core R&D,but also reduce compliance risks in the import link.

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