What kind of driver's license is required for a tricycle?

[SanKira]

Tricycles require a C4 driver's license. Here is the relevant introduction to the C4 driver's license: Introduction: The C4 driver's license is a type of driver's license and was a type of driving permit before May 2004. Expansion: After May 2004, in accordance with the "Road Traffic Safety Law" (implemented on May 1, 2004) and its supporting policies, the old version C licenses held by these drivers were automatically converted into B1 licenses (B1 driver's license) in the driver's license database of the municipal vehicle management office. If the conversion is agreed to, holders of the old C license must submit an annual medical examination report; if they do not wish to convert, they must apply to the vehicle management office to downgrade to a new C1 license (C1 driver's license).