Which of the following skills does not belong to Haodong Three Musts?

The dragon emperor banned the law. In the game "Douluo Continent", the game official will set various questions for the players. One of the questions is which of the following skills does not belong to the three wonders of Dong Hao, because thinking about winter boxing is like spring; Reading the Winter Sword is his released skill, so the forbidden method of Ghost Dragon Emperor is not, but the skill released by Tang Wulin characters.