Politics, business, and academia, these are the three realms. Blue-collar, gray-collar, pink-collar, white-collar, and gold-collar are the so-called five-collar. The white-collar workers enjoy themselves in a leisurely way, while the white-collar workers are envious of the gold-collar positions and powers, but they rarely have time to comfort their wives. Party school lecturer Chen Mingluo returned to the age of sixteen, and he decided to jump out of the three realms and not be among the five-collar workers. A detached black collar. Chen Mingluo said to the reincarnation administrator Niutou who was registering him. What is a black collar? The bull in front of the computer was puzzled and asked with a simple and honest face. With your IQ, it is difficult for me to explain clearly. Chen Mingluo said proudly .