According to Alibaba's policy, short-term workers need to undergo a physical examination when they change to long-term workers. This is to ensure that the employee's health condition meets the company's requirements for long-term work.

The physical examination includes examinations of various body systems, such as cardiovascular, liver, kidney, lungs, etc., and will evaluate the employee's imaging and laboratory tests.

If an employee is found to have some potential diseases or physical signs, the company may conduct an in-depth examination to ensure that the employee's physical condition meets the company's requirements and can continue to contribute to the company.