Professional Interpretation of Import Letter of Credit Operations: Full-Cycle Agency Services from Issuance to Arrival of Goods

Import of Southeast Asian Fruits: Time and Quarantine Challenges Behind Letter of Credit

In 2026,agricultural trade between China and ASEAN has become increasingly close,and Southeast Asian fruits represented by durian,mangosteen and coconut have become key categories for domestic importers.However,the import operation of such fresh products is far more complex than that of ordinary goods.A client,Ms.Peng,encountered a typical dilemma when trying to import a batch of durian from Thailand on her own: the foreign merchant insisted on payment by sight letter of credit,but Ms.Peng had a poor understanding of the specified requirements for the "issuing authority of plant quarantine certificate" in the L/C terms,and had no clue about the mandatory cold treatment time after cargo arrival and the connection process with customs and commodity inspection departments.Even a single delay could cause the entire container of fruits to spoil at the port,resulting in huge losses.

The difficulties of such import businesses are concentrated in several aspects.In the payment link,improperly drafted L/C terms can easily become an excuse for foreign merchants to delay delivery or shirk quality responsibilities; in the document link,any non-compliant document such as certificate of origin,plant quarantine certificate or sanitary certificate will prevent the goods from clearing customs; in the logistics and quarantine link,complete temperature control records for cold chain transportation are required,and goods must be immediately transferred to designated supervised cold storage for processing after arrival at the port,waiting for joint inspection by customs and animal and plant quarantine authorities.Any disruption at any node will incur high container detention and port storage fees,and may even lead to cargo return or destruction.

Core Role of Zhongshen’s Import L/C Agency Service

Facing these systemic risks,a simple "document issuance agency" is no longer sufficient.The import L/C agency service provided by Zhongshen essentially acts as a risk control and process coordination center for importers.Our value starts before the L/C is issued and runs through until the goods safely enter the domestic warehouse.Ms.Peng entrusted her business to us later because we can integrate and seamlessly connect financial tools (letter of credit),physical logistics (cold chain transportation) and government supervision (customs and commodity inspection).

Our supervisors,such as Supervisor He,when taking over Ms.Peng’s durian import project,first evaluate not the L/C issuance fee,but the vulnerable points of the entire trade chain.Supervisor He needs to ensure that the L/C terms can protect Ms.Peng’s payment security,be smoothly accepted by foreign merchants,and fully align with the current regulatory requirements of China Customs and commodity inspection for Thai durian.This requires the agency to not only master international settlement rules,but also have in-depth knowledge of the import access policies and dynamic updates for specific commodities.

Phased Process Breakdown and Professional Handling

Phase 1: L/C Application and Document Pre-Examination

At this stage,our work goes far beyond submitting standard documents to the bank.Taking agricultural products as an example,the key document pre-examination includes:

• Verify foreign merchant qualifications and official export licenses: Confirm whether the exporter is on the registration list of the General Administration of Customs of China,and whether the registration numbers of the orchards and packaging plants provided are valid.This is the prerequisite for cargo entry into China.
• Design protective L/C terms: In addition to basic elements such as amount and date,we will focus on reviewing and recommending additions such as "negotiation documents must include the plant quarantine certificate issued by the Ministry of Agriculture of Thailand indicating that the batch of durian comes from a registered orchard",translating government regulatory requirements into payment conditions to control document compliance from the source.
• Pre-examine the full list of required documents: Provide the customer with a clear document checklist specifying the issuing party,key content and submission deadline for each document (commercial invoice,packing list,bill of lading,certificate of origin,plant quarantine certificate,sanitary certificate,etc.).

Phase 2: Pre-Arrival Preparation and Port Declaration

After the goods are loaded onto the vessel,our work focus shifts to the domestic port.For fruits requiring cold chain transportation,we will complete the following preparations at least one week before cargo arrival:

• Book supervised cold storage and quarantine treatment: Based on the arrival time,pre-book space at the port-designated cold chain inspection platform or supervised cold storage,and simultaneously schedule the joint inspection time for customs and animal and plant quarantine authorities.For fruits that may carry pests such as durian,cold treatment (usually at approximately 0°C for more than ten days) is mandatory,and the treatment cycle must be planned in advance.
• Organize and submit customs declaration and inspection documents: Before cargo arrival,submit the full set of electronic documents (including pre-examined foreign merchant documents) to customs and commodity inspection authorities for pre-review via the "Single Window" system.This step significantly shortens formal declaration time after cargo arrival.
• Coordinate logistics connection: Maintain communication with shipping companies,ports and cold chain transportation fleets to ensure goods are promptly picked up from the port area after unloading and transferred to the booked supervised cold storage,avoiding prolonged exposure to high port temperatures.

Phase 3: Port Inspection,Quarantine and Goods Release

This is the stage with the highest concentration of risks.After the goods enter the supervised cold storage,customs and commodity inspection personnel will conduct on-site inspection of cargo appearance,verify markings and collect samples for laboratory testing.Our on-site coordinators,such as Supervisor Ni,will accompany the entire process and be responsible for:

Clearly explaining cargo details,submitted certificate contents and completed pre-treatment measures to inspection officials.If officials raise questions or request supplementary materials,Supervisor Ni can promptly understand requirements and coordinate with the customer or foreign supplier to provide materials on-site,avoiding inspection delays due to communication gaps.Once inspection is passed,we will immediately handle tariff and value-added tax payment procedures,obtain the Inspection and Quarantine Certificate for Entry Goods,and arrange transportation to deliver the goods from the supervised warehouse to the customer’s designated domestic warehouse.

Actual Case: On-Site Risk Mitigation

Looking back at Ms.Peng’s durian import case,when the goods arrived at Shanghai Port,the animal and plant quarantine authority found tiny suspicious worm holes on individual fruit shells during sampling.This was a potential risk signal,which could have required extended fumigation for the entire batch or even led to a rejection determination.At the scene,Supervisor Ni immediately retrieved the original pre-export fumigation records for the batch from Thailand (one of the mandatory pre-submitted documents we required from foreign merchants) and presented complete cold chain transportation temperature records to inspection officials,proving no temperature abnormalities during transit that would have caused egg hatching.

Additionally,Supervisor Ni judged based on experience that the worm holes were likely residual marks from the early harvesting stage and were no longer viable after pre-export fumigation.He proposed and cooperated with officials to expand the sampling scope and conduct on-site dissection of suspicious fruits.Ultimately,no live pests were detected in laboratory tests,and with complete official certificates and treatment records,the goods were successfully released after completing the scheduled cold treatment.If handled by an inexperienced importer,nervousness or unclear communication could have led officials to take more conservative measures,resulting in double losses of time and money.

Summary of Professional Agency Value

The ultimate value of import L/C agency services is not merely completing a banking financial transaction,but transforming uncontrollable cross-border trade into manageable supply chain links through professional process design and proactive risk management.For importers,this means:

Fund security is guaranteed via professionally drafted L/C terms; time costs become predictable through pre-planned and coordinated regulatory processes; compliance risks are drastically reduced as every document detail undergoes dual review and aligns with current regulations.Ultimately,importers like Ms.Peng can focus their energy on marketing and customer relationship management,while entrusting complex import customs clearance matters to professional partners like Zhongshen for efficient and reliable execution.In the increasingly complex and specialized international trade environment of 2026,this division of labor and collaboration is the foundation for enterprises to enhance competitiveness and steadily expand their import business.