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Write-ups built on catalog data: what breaks in Encar, Che168, Copart and IAAI listings, how export rules meet real listings, and how to keep sold cars off your site. With methods, measurement files and code.

10 November 202611 min readChe168
About one in seven dated used-car listings in our China sample fell within 180 days of reported registrationOne day on a registration certificate can decide whether a Chinese used-car exporter needs a document from the manufacturer. In our 6 November 2026 snapshot of China listings with a catalog year of 2025 or later, 195 of the 1,397 listings with a reported registration date fell within 180 days of that date.