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.,Reasonableness is the first thing an underground worker should consider, as Comrade "Zhu Lin" instructed and Cheng Qianfan always kept in mind.,Li Hao is a ticket seller on Line 2 of the subway. He wears a yellow plaid uniform and has a white cloth bag slung across his shoulder to hold the fare money.。