Why did Yu Hong insist that Su Rui was killed by Li Xiaonan in the TV series Zhao Jiang Li Ming?

However, in this TV series, Yu Hong plays Li Xiaonan's husband's lover. Yu Hong and Li Xiaonan were originally in the same company, but in fact there is no connection, just because of a man, their lives have crossed.

Yuhong insists that Sue was killed, and there is a very important evidence, that is, the hairpin on her head. After Li Xiaonan's husband's accident, Yu Hong has been looking for some clues of evidence, and he also wants to find a truth. When she ran to the riverside of Baishitan, she found a key piece of evidence, which turned out to be a hairpin that Li Xiaonan used to wear in the company. Why did Li Xiaonan stay at the scene with such important evidence? And she hasn't worn this hairpin for many years, obviously on purpose, and why is it so easy for the police to find it after so many days? Yuhong has no time to think so much. He thought that the hairpin could prove that Li Xiaonan killed Suri at the scene, so he later asserted that Li Xiaonan was the murderer. Although he never gave the evidence to the police, he was convinced in his heart.

So, is Li Xiaonan really the murderer? Of course not. When I first watched TV, I really thought Li Xiaonan was the murderer, because she should have sent the text message to Tiger Brother, not her husband. But in fact, Li Xiaonan didn't want to kill anyone at all. She was called Tiger Brother to lure her husband away. Only then was she able to escape from the river. Li Xiaonan did all this just to protect himself. Moreover, only by putting himself to death can the husband not find trouble for himself and the family live a stable life.

Facts have proved that Li Xiaonan is really not a murderer. Besides, she hasn't worn that hairpin for many years, and she keeps it in the drawer at home. So who has the ability to get this hairpin? Besides her husband, there is another person who is her brother-in-law. It's obvious that the murderer made some false appearances just to frame the crime and confuse the police!