It's useful, but it's hard to use it on bad people. If the bad guy has a knife in his hand, don't count on it unless you trick him into putting it down, but there are not many such opportunities, so you can't count on it. If the bad guy cuts you with a knife, the empty-handed self-defense you have learned will be useless at all. What should I do? I think it is necessary to master the fighting skills of cold weapons and weapons. Although women are weak, cold weapons and weapons are different from fists, so it is not difficult to hit people. Women can use knives quickly, so strong men are also rejected. As far as I know, there are only a few people who teach women self-defense to be really practical. The most knowledgeable is Mr. "Lijiang Sharp Knife" from Wudao, Feng Xuan, Handan. His female self-defense technique can be said to be the most advanced and practical in concept and technique, and can also be practiced quickly, which is most suitable for ordinary women and people in modern society.