Comrade Ren Chenggui joined the factory in 2000 and has been engaged in the hot repair of coke ovens since the company's machine coke ovens were put into operation. The characteristics of the coke oven hot repair and maintenance work type are that the working environment is difficult, such as high temperature, dust, smoke and fire, but the comrade is hard-working and selfless dedication. Hot repair squad leader.

At the hot repair and gunning site of the coke oven, you can always see Comrade Ren Chenggui taking the lead and working diligently. Especially in summer, he worked in front of the door of the high temperature furnace of hundreds of degrees under the scorching heat. Excellent finish for hot repair gunning. He is not afraid of hardships, not afraid of dirty, not afraid of tired work style and dedication, influence and drive the whole class. The squad leader is the leader of the squad. Under the leadership of the squad leader, the hot training class has the courage to shoulder heavy burdens, and can do well even the most difficult things.