Nine lives:

In the first episode, what Mei Mei eats at night can cure the son's heart disease. The former owner is the son's mother. In order to let the son live safely, she blinded his eyes. The son was bent on revenge and practiced peerless techniques, but he also had a heart attack that shortened his life. The only cure for heart disease is nine lives, otherwise he won't live for five years.

Plot:

During the Five Dynasties and Ten Kingdoms period, the girl Qi Xue was sold to a brothel by her evil father Wang Su. Liang, the evil captain, picked Qi Xue to drink for fun. The mysterious woman with an oil-paper umbrella suddenly appeared, killed Captain Huang, and said that as long as Qixue could get to Chaos Tomb before sunset, she would be taken into Chancheng. Unexpectedly, Qixue escaped from the brothel and fell into a coma, failing to keep the appointment in time.

The mysterious son came to the chaotic grave and was assassinated. Seven snow was very scared to see this behind the scenes. Childe looked for an antidote, but found nothing. The next day, Qi Xue found a pill in the sewage and swallowed it.

Extended information about the consequences of eating beads:

After Yueying knew that Yuemei had eaten nine lives, she asked her son to dig out Yuemei's heart and eat it, so that her heart disease would be cured. My son doesn't know this is the best way, but he can't get rid of late Mei.

In childe's heart, late plum is all he has, including his heart. He killed Yemei, which is equivalent to losing his heart. Living like a walking corpse is the most painful thing, so the son didn't hurt Yemei, but helped her to sit on the seat of the duke.

References:

Baidu Encyclopedia-Flatterers have no boundaries