Wu Erbai, the second uncle of Wu Xie, set the fire at the diaojiao building in Tomb Robbery Notes.

The reason given by my second uncle is that I am afraid that Wu Xie and others will make the same mistakes as their predecessors, because the Wu family has been dying for several generations because of this.

Sec. Uncle cited an example, because the secret of the Zhang family, Gu Lou, had something to do with immortality. The emperors of ancient China were all looking for the secret of immortality. They believed that the secret of immortality was hidden in the tombs of ancient alchemists, so some teams appeared to help the emperor conduct on-the-spot exploration. And longevity is not only attractive to emperors, but also a great temptation to these seekers. When they really find some clues, they will inevitably have their own ideas, so they form some plans, but once the plans are discovered, the end of these people will come.

Extended information:

The burning of Tomb Robber Notes in Wu Erbai shows that Uncle Er is resourceful and shrewd, and he is the soul of the Wu family. He seems to be indifferent to the world, but in fact he works step by step. He is proficient in daoist magic, good at playing chess, and likes to collect everything related to Qin Shihuang. He is a huge fan of him.

Although there are very few scenes in the book, most of them are described by Wu Xie. Once saved Wu Xie and others in Banana and set fire to the old residence of stuffy oil bottle. Wu Xie is in awe of him. "Calculating juwan is equal to dying" shows that he is very shrewd.