A man broke off his hand and then developed an invincible swordsmanship with a woman. What is the name of the TV series?

Did the man practice something called "Qingtian Sword Technique", which he practiced by chopping firewood with one arm? The woman was taught by some kind of mother-in-law. Later, there was a time when the two of them Someone was drugged in the room, and the two of them were in a daze. If this is the plot, then I have seen it, but I can't remember the name for the moment.