20 episodes. In the 20th episode of TV series "In Spring", Liu Xue, played by Bo Huang, finds the food in the canteen unpalatable and can't help but go to the foreman's iron theory. Wu Xue learned that he was going to hurry and wouldn't let him say. On the one hand, he was afraid that Tiezi would take the opportunity to expel Liu Xue, on the other hand, he was afraid that it would have an impact on his future salary.