中國沒有簽條約

http://beijing.usembassy-china.org.cn/driving_in_the_u.s

Foreign Driver's Licenses Motorists visiting the United States from countries that have ratified the Convention on Road Traffic, may use their own valid driver licenses to drive in the United States.

https://treaties.un.org/Pages/ViewDetailsIII.aspx?src=TREATY&mtdsg_no=XI-B-19&chapter=11&Temp=mtdsg3&lang=en

China has not ratified.