Guo Degang a super funny comedy, the whistle body in the section called what is the name, or video link can also be

The segment is "The Teacher Comes" Sun Yue has a whistle, blowing the whistle on and off class, Yu Qian loves to fart, so he picked up a bullet shell from the target range, and blocked it there, once, Sun Yue and Yu Qian at the same time to the toilet, Sun Yue took off the whistle and hung it on the wall, Yu Qian hung the bullet shell next to the whistle, after the convenience of the two took the wrong one, Sun Yue took the bullet shell away, Yu Qian took the whistle away, and to put it on the time to the whistle blocked it there, and then it rang. The first time I saw it, it was a very good one, and it was a very good one.