What qualifications do shunting personnel need?

College/high-tech and above. According to the recruitment websites of shunting personnel of various companies, shunting personnel need to have a college/senior engineer degree or above, be in good health, be colorless and weak in color blindness, have corrected vision above 5.0, and be able to adapt to shift work. The shunting crew's job is to connect the trains that need to be grouped together to form a train, and separate the trains that arrive at the station or need to be grouped separately from the whole train.