Definition
Public Announcement of Aquatic Product Landing Auction and Traceability refers to associating the vessel trip or batch, species and specifications, weighing results, and key cold chain nodes (such as ice addition, temporary storage, and transportation) as traceable records during the weighing, grading, packaging, and bidding process after fish are unloaded at the port, and disclosing them to buyers and the public through on-site screens, mini-programs, or regulatory interfaces, meeting the requirements of agricultural wholesale and food safety management for traceable sources and accountability.
Unlike room-temperature agricultural products, fresh aquatic products are extremely sensitive to time windows: often only a few hours pass from deck to auction platform. The system must rapidly generate batch numbers and traceability codes under peak concurrency and align them with temperature logs from cold storage and transport vehicles, avoiding mismatches like "one set of numbers for weighing and another for cold chain" which would invalidate announcements or make audits inconsistent.
- Announcement Elements: Catch/port arrival time, vessel number or supplier, batch, gross and net weight, temperature control summary (curve or key time points).
- Business Goals: Ensure fair bidding, provide evidence for dispute resolution, and allow one-click access to on-chain evidence during recalls and regulatory inspections.
Technical Features
The onsite side typically includes networked electronic scales, label/receipt printing, public display screens or query terminals, and optionally, live auction streaming equipment. During peak morning market hours, concurrency is high, so the network must support short-term burst reporting and small packet transactions (scanning to check batches, refreshing public displays). In weak network conditions, local queuing and breakpoint resume should be supported to avoid blocking weighing workflows.
Temperature control and weighing data should have a unified time reference (recommend GNSS/NTP) and be bound to the batch key on the platform side; abnormal temperature rises or chain breaks should distinguish between "device malfunction" and "real cold chain break" to reduce false alarms that disrupt auction order.
- Data Integrity: Key records should include non-repudiable elements (timestamp, terminal identifier, operator or workstation number, anonymized according to regulations).
- Display and API: Public screens and mobile queries should share the same query interface to avoid duplicating standards.
Use Cases
Applicable to fishing ports, aquatic product wholesale markets, fresh produce distribution centers, and origin aggregation points with onsite bidding; also seen in the "direct sourcing from origin + urban distribution" model, connecting and reconciling batches landing at the port and batches entering urban warehouses for public display.
SimtoLink can provide manageable and controllable cellular access and connection management for weighhouse gateways, public display terminals, and mobile query scenarios, facilitating template-based activation and cost visibility when replicating across multiple ports and stalls.
Key points for cooperation with IoT SIM cards
Differentiate between 'dial success' and 'service transaction success' during acceptance: besides card status, it is recommended to sample test the performance of DNS, TLS, and service ports under peak traffic and weak network reconnections.
- Data plan and pooling : Divide data pools by dock or region, differentiate between weighted small traffic and large traffic such as live streaming/images, and set threshold alarms.
- Network policy : Evaluate private network APN, fixed exit IP, roaming, and SIM-card binding to meet platform whitelist and regulatory access requirements.
- Asset ledger : Bind ICCID, IMEI, scale/stall number, and ensure silent cards and abnormal traffic enter the work order closure loop.
- Reliability : Key weighing rooms may consider dual SIMs with dual carriers or cellular plus wired primary/backup; agree on online rate, reporting success rate, and delay percentiles.
- Compliance : Merchant and shipowner information is collected and retained on a minimum necessary basis, and contracts specify the boundaries of cross-border and subcontracting.