I saw my brother in learning about threat defense knowledge that day, I suddenly came in, I will let my brother also told me some threat defense, brother said is this threat defense knowledge is really useful, he also suggested that when I was good to learn some more, brother is such a person, as long as there is time, he will go to learn the knowledge, learn from him I have not heard of, anyway, at least the threat defense I really have not heard, but I think threat defense knowledge is really very good, since I have the interest, then I want to learn, so I and my brother talk, we learn threat defense two with knowledge, brother agrees, hear brother say this, don’t mention how happy I am.