Deep in Dabie Mountain, a group of teenagers are making a hard trek. It is Li Xi's daily task to take care of her daughter's three meals a day. Every year, she graduates from high school, and the national college entrance examination is referred to as "College Entrance Examination". It is an important turning point for nearly ten million people to change their destiny. With 20,000 students, Maotan Factory Middle School is one of the schools with the largest number of college entrance examination students in Anhui Province, and it is also the college entrance examination factory in parents' minds. Study is extremely tense, and rest time is precious. Conditional parents choose to accompany them.