Chinese customs screened over 600m travelers and 300m vehicles in the past five years, detecting 180,000 infectious disease cases and intercepting 5.25m potential carriers, officials said Monday.

Deputy Director General Zhao Zenglian highlighted a robust “closed-loop” system linking border checks to home follow-ups.

The measures, refined after China’s zero-COVID policy, aim to prevent imported illnesses while supporting tourism and foreign investment, Reuters reported.