This is a very common attire for intellectuals, giving Cheng Qianfan an air of scholarship, like a university student or a young teacher in a school.,When Cheng Qianfan took the tram at that time, Lao Liao pretended to get on the tram. The two would have contact at this moment, secretly and quickly completing the transmission of information or items.,The trains were crowded, with many passengers waiting. It was generally difficult for the elderly and weak to get on board.。