The Pre-inspection system for check-in luggage project of Shanghai Pudong Airport includes the construction of 7 international arrival preliminary inspection systems in Terminal 1 of Pudong Airport.

As a research and development task in the "smart travel inspection", the preliminary machine inspection mainly realizes the "pre supervision" supervision mode of customs to implement non-invasive machine inspection of checked baggage of inbound passengers in the baggage sorting area in advance, and intercept and inspect at the customs clearance site. Adopting the working method of "image interpretation, classification control, and key supervision" can well reflect the modern intelligent customs supervision concept of "full coverage, centralized judgment, classification review, and graded distribution".