Li Yu's documentary "Sister" made Rui Rui see his predicament, so Rui Rui got a chance to change his destiny. With the support of good people, she returned to school, studied hard, studied hard, was admitted to an ideal college, and is currently studying abroad.

Documentary is a film and television art form that takes real life as the creative material, real people and real events as the performance objects, and artistically processes and displays them. Its essence is to show the truth and use it to arouse people's thinking.