How many hours of online study are required for Subject 4?

[DelMaggie]

Different types of driver's licenses have varying hour requirements for Subject 4. For ordinary C1, C2, and C5 licenses, Subject 4 requires 10 hours of study; A1, A2, and B1 licenses require 16 hours; and A3 and B2 licenses require 20 hours. Each study hour consists of 60 minutes, with effective teaching time not less than 45 minutes. Below is an introduction to driver's license categories: 1. Small vehicles: Applicants for small cars, small automatic transmission cars, or light motorcycles must be between 18 and 70 years old. 2. Trucks: Applicants for low-speed trucks, three-wheeled vehicles, ordinary three-wheeled motorcycles, ordinary two-wheeled motorcycles, or wheeled self-propelled machinery must be between 18 and 60 years old. 3. Buses: Applicants for city buses, medium-sized buses, large trucks, trolleybuses, or trams must be between 21 and 50 years old.