Why does cherry red Jiao Jiao burn red documents?

In order to prevent Honghong from going to school in the city. This clip comes from the thirtieth episode of the TV series Cherry. Jiao Jiao burned the red file to prevent her from going to school in the city. Cherry is a tragic rural TV series directed by Wang and starring Hong Hai and others. It was broadcast on Shandong Satellite TV on February, 2065438 19. It mainly tells the story of Cherie, a mentally retarded mother, and Wang Ge, her lame husband, raising an abandoned baby and helping Honghong find her real father.