It is said that "FB" is the pinyin abbreviation of "corruption". Perhaps it was the use of FB to indicate that corruption is lazy and easy. "FB" development to date, there is no one definite meaning. But in the network, "FB" never means corruption, but probably means to spend the least amount of money to eat, drink and have fun in AA system. When someone says to you online, "Let's go FB", he means AA system to eat, drink and have fun!
QC is short for QUALITY CONTROL, which is defined in ISO9000:2005 as "a part of quality management that is dedicated to meeting quality requirements".
Sadomasochism, known in the West as sadomasochism (referred to as sm sadism), collectively refers to the awareness and behavior associated with sadism and masochism.