Double Undercover

China, Southeast provinces, Qingyuan County, Qingyuan high school, the northwest corner of the playground, at this moment, some interesting things are happening. This is a very remote corner, which is covered by luxuriant grass and wantonly spreading branches and leaves. Although the sun is blazing outside and the students who are having physical education on the playground are sweating in the sun, the enclosed place forms a quiet and narrow space.