In-depth Analysis of Full Process of Air Freight Import and Export Customs Clearance and Precise Control Strategies for Key Nodes

Preparatory Work and Document Verification

The first checkpoint of air freight customs clearance often determines the customs clearance efficiency of the entire cargo.In 2026,China Customs will fully implement the intelligent pre-audit system for electronic documents,putting forward higher requirements for document integrity and logical connection.Last year,a shipment of electronic products exported to Europe by Mr.Ge triggered automatic manual review by the system because the difference in gross and net weight between the packing list and commercial invoice exceeded 3%,delaying flight stowage for two full days.This case exposes typical problems in the preparatory stage: insufficient cross-checking of document information,commodity code classification deviation,and missing regulatory certificates.

Zhongshen’s core role at this stage is reflected in front-end risk screening.After receiving Mr.Ge’s entrustment,the customs clearance team will complete three tasks before cargo warehousing: First,compare the cargo name,quantity,amount and weight information of four basic documents: trade contract,invoice,packing list and waybill,to ensure "four-document consistency"; Second,accurately match HS code according to cargo attributes,especially for the newly added categories of intelligent hardware and new energy products in 2026,to avoid declaration rejection caused by incorrect classification; Finally,check regulatory conditions to confirm whether 3C certification,import license or animal and plant quarantine certificate is required.

Common problems fall into two categories: First,for low-value cargo through air express channels,enterprises often neglect preparation of brand authorization letters,and the interception rate of the customs intellectual property system is as high as 15%; Second,for air transport of chemicals and dangerous goods,the validity and version of Safety Data Sheet (SDS) and transport condition identification certificate do not meet the latest IATA regulations.Zhongshen has established a dynamic database of regulatory certificates,which issues a 30-day advance alert for certificate expiration for regular cargo of long-term clients like Mr.Ge,avoiding the risk of cargo return caused by expired certificates.

Pre-entry and Declaration

After completing document verification,we enter the pre-entry and declaration stage of customs declaration.In 2026,Shanghai Port promotes the "smart declaration" mode,which allows enterprises to realize automatic data capture and intelligent filling through the single window system,but the rigid feature of the system’s logical judgment also brings new challenges.The completeness and standardization of declaration elements have become the focus of customs review,especially elements such as brand,model,function and use,and vague expressions will directly trigger declaration rejection.

Zhongshen’s customs clearance system realizes API connection with the customs single window,and adopts a "man-machine double review" mechanism in the pre-entry stage.The system automatically fills in regular items based on historical data,and customs declarers focus on reviewing variable information such as commodity specification and model,transaction term,freight and insurance premium.For the precision instruments that Mr.Ge often imports,the team will request technical white papers from foreign suppliers in advance to ensure that the descriptions of "working principle","measurement accuracy" and "applicable industry" in the declaration elements fully match the customs commodity classification guidelines.

Typical problems at this stage include: abnormal dutiable value caused by unreasonable allocation of freight and insurance premium; logical contradiction between trade country and country of departure; incorrect conversion between quantity unit and legal unit.Zhongshen has established a declaration element template library,and pre-sets standardized declaration templates for conventional imported goods of Mr.Ge’s company,increasing the declaration accuracy to 99.2%.Meanwhile,for under-valuation and over-valuation behaviors that customs focuses on monitoring in 2026,the system has a built-in price early warning model that automatically compares the average import price of similar commodities in the same period,and triggers manual review if the deviation exceeds 20%.

Customs Inspection and Release

After the customs declaration is reviewed and cleared,the cargo enters the customs inspection stage.In 2026,air ports promote the new mode of "non-intrusive inspection" and "facilitated supervision",increasing the machine inspection rate to 85%,but the proportion of manual inspection for high-risk commodities has not decreased.Inspection instructions are divided into four categories: weight verification,unpacking inspection,thorough inspection,and sampling for testing.Mr.Ge once had a batch of imported valves ordered for thorough inspection,and customs required disassembling the product to check the internal structure.The declaration was finally confirmed to be correct,but the delivery date was delayed by three days.

Zhongshen’s response strategy at this stage is "active communication,advance preparation".After receiving the inspection notice,the customs declarer will contact Mr.Ge within 30 minutes to confirm the cargo storage location and on-site cooperating personnel for unpacking.For commodities requiring technical explanation,auxiliary materials such as product manuals,structure diagrams and function demonstration videos are prepared in advance.In 2026,customs allows enterprises to upload supplementary explanations in real time via mobile devices at the inspection site.Zhongshen’s inspection specialists carry portable scanners and 5G terminals to complete document submission on site,reducing the average inspection time from 4 hours to 1.5 hours.

Common problems are concentrated in: inconsistency between cargo shipping mark and customs declaration information; excessively long sampling and testing cycle affecting delivery; enterprises cannot provide effective supporting evidence when customs questions the declared price.Zhongshen has established an inspection plan library,and pre-prepares price proof chains such as price composition analysis tables,original factory invoices and payment vouchers for the main product categories of Mr.Ge’s company.Meanwhile,we have established an expedited inspection channel with port inspection institutions,shortening the testing cycle of conventional chemicals and textiles from 7 working days to 3 working days.

• Before inspection: Check consistency of cargo shipping mark,model and quantity with the customs declaration
• During inspection: Cooperate with customs for unpacking,moving and re-packaging,with full-process video recording
• After inspection: Collect the inspection record form in time and confirm the inspection conclusion and release order
• Abnormal handling: For problems found in inspection,submit situation description and rectification plan within 24 hours

Post-clearance Settlement and Tax Refund

The settlement and tax refund link after cargo release directly affects an enterprise’s cash flow.In 2026,the export tax refund system and the foreign exchange monitoring system are deeply linked,requiring stricter "three-document matching" logic for customs declaration,VAT invoice and foreign exchange receipt slip.Mr.Ge’s company once missed the first declaration period for tax refund due to delayed issuance of VAT invoice,resulting in more than one million funds being tied up.

Zhongshen provides integrated closed-loop service of "customs clearance - taxation - foreign exchange".After cargo release,the system automatically pushes tax refund reminders and assists Mr.Ge to compare the name,quantity and amount of VAT invoice with the customs declaration information.For the "instant declaration instant refund" pilot policy implemented in 2026,Zhongshen helps eligible enterprises achieve tax refund arrival in T+3 days,which is 60% faster than the traditional mode.In the foreign exchange receipt and payment link,we assist enterprises to complete tax filing and bank declaration for overseas payment,ensuring compliance of matching between capital flow and cargo flow.

Common problems include: declaration error caused by untimely update of tax refund rate library; excessive difference between foreign exchange receipt amount and customs declaration amount triggering verification by the State Administration of Foreign Exchange; improper handling of customs declaration currency for cross-border RMB settlement.Zhongshen’s tax team tracks the latest tax refund rate library every month and reviews tax rate applicability for export commodities of Mr.Ge’s company.Meanwhile,we provide foreign exchange hedging suggestions to avoid the impact of exchange rate fluctuations on tax refund amount.In 2026,customs and taxation data realize real-time sharing,and Zhongshen’s client terminal can view the matching status of customs declaration,invoice and foreign exchange receipt in real time,with abnormal data marked with red alert,ensuring one-time successful tax refund declaration.

Air freight import and export customs clearance is not an isolated single-point operation,but a systematic project running through the entire trade process.The value of Zhongshen’s 20 years of accumulation lies in integrating scattered links into a standardized service chain.For enterprises like Mr.Ge’s,we provide not only document processing,but also risk prediction,cost optimization and efficiency reconstruction.The foreign trade environment is getting tighter in 2026,and the value of professional agency is becoming more prominent.Choosing Zhongshen means leaving complexity to us,and leaving simplicity and certainty to customers.