In order to add Jiang Si's WeChat account, Xu Yanqing added everyone who had added him that day and asked each one - [Jiang Si?
Until she replied, [Teacher Xu, have you forgotten me...]
Xu Yanqing's face darkened, he kicked his friend's butt, and replied, "I didn't forget". He waited anxiously for the little girl to reply, and added uneasily, "Don't be angry, I'll wait for you in the library."