"QB wusu" is a network term, which comes from the communication between game players. It usually means "nothing happens, everything is normal" and is widely used. This expression comes from a mechanism in the game. When there is no problem, a window will pop up on the game interface, which shows "qb Wusu", indicating that the current game is running normally.

although qb wusu comes from games, it has now become a common expression in social media and online chat. It can be used to express a dull mood, or to indicate that something has no problems, or to answer concerns or inquiries raised by others.