Cheng Lei, who is in the midst of a growth spurt and stands at 1.65 meters, is already 2 centimeters taller than his father. As he rests on his father's back, his feet occasionally graze the ground, and after every few steps, Cheng Linxiang has to stop and adjust his son higher up. Liu Zhiqin, walking behind her husband, supports her son's body to help alleviate some of the weight.