What exactly is the letter with a checkmark on the t in the vehicle license?

[LaAna]

This letter is the Greek letter 'tau'. The printer models used by public security departments employ proprietary symbols, resulting in printed font effects that differ from those produced by standard printers. Vehicle license text: The main page of the vehicle license has black text. The phrase 'People's Republic of China Motor Vehicle License' is in 12pt bold font and centered. Other text includes 'License Plate Number', 'Vehicle Type', 'Usage Nature', 'Owner', 'Address', 'Brand Model', 'Engine Number', 'Vehicle Identification Number', 'Registration Date', 'Issue Date', etc. Components of the vehicle license: The motor vehicle license is the legal document permitting a vehicle to drive on roads within China. The license consists of three parts: the document, the main page, and the supplementary page. The front of the main page contains the endorsed certificate core, while the back has the vehicle photo, both sealed in plastic. The supplementary page is the endorsed certificate core.