Did BYD sign the contract before or after he joined the company?

After joining the company. According to BYD's recruitment information, BYD's contract will not be signed until everything is clear, and it is signed after joining the company and belongs to a regular employee. BYD was founded in February 1995, and its headquarters is located in Shenzhen, Guangdong Province. Its industries include electronics, automobiles, new energy and rail transit.