Coolie: The entry-level length of service is generally 1-2 years. Replace the lamps and buttons, and the appearance is slightly damaged. Second-class workers: generally 2-4 years of service. Remove the bumper, door panel and general appearance. Big worker: the length of service is generally more than 5 years. Independent correction of accident car body, girder and appearance repair.

It seems that there are only big workers and small workers, and big workers have high and low technical standards. To put it bluntly, coolies are people who can't finish their work independently and know how to operate. A coolie is a mechanic who can finish his work independently ||| A coolie is an apprentice. Small workers who can do simple maintenance for two or three years are called middle workers, and big workers are called masters!