Sign in for 100 Days, from a Poor Student to Qingbei

Travel through a parallel world and become a super bad student. Activate the sign-in system and sprint to Qingbei within a hundred days. Zhang Ming: "Teacher, it's too troublesome for you to explain this question!" So, Zhang Ming gave his answer eloquently, and the teacher was stunned. A school beauty who is a top student: "Zhang Ming, are you free tonight? I want you to help me with my body... No, with my math..." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.