In fact, driver training is based on company regulations. Some companies only train for one day, while others need three days. In fact, the content is similar. Drivers have driver's licenses, and the company doesn't care about the driving company at all. The company's training content is mainly about the company's management regulations on driver training, how to serve customers and matters needing attention in the process of taking orders.
The reason for the three-day training is that the company has to evaluate new employees.