A Good Son-In-Law of the Tang Dynasty

When Zhang Zhongjian was very young, he worshiped a disabled old man as his master. He learned many weird skills from his master and listened to many unbelievable 'stories' that had not even happened yet. It wasn't until his master was dying that Zhang Zhongjian knew that his master was actually a time traveler. The Sui Dynasty was overthrown and the Tang Dynasty was rising, and the tide of history was rolling forward. For Zhang Zhongjian, who knew the progress of history, as long as he held on to a few thighs, he could easily achieve wealth in his life. Zhang Zhongjian's first target was Li Ling, the illegitimate daughter of Tang Guogong Li Yuan.