中单小甜心
[zhōng dān xiăo tián xīn]
A term likely derived from the online gaming culture, where '中单' (Zhong Dan) means the player plays in the middle lane (mid-lane position), and '小甜心' (Xiao TIANxin) can be referred to a person being sweet or cute. It could imply a young female gamer who appears charming in games.