It is customary to say that your leader is older than you in the unit, and add a nickname before your surname. For example, the leader calls young subordinates Xiao Li, Xiao Zhang and Xiao Wang, which shows his concern and closeness to the younger generation. The elders of the same generation used to add old words before surnames, such as Lao Wang, Lao Zhou and Lao Yang. However, it feels strange and awkward to call them by their full names in life.