 And I'm proud of that. Most people feel guilty about it. Because according to the morality out there, you should sacrifice. You should save the neighbor's kid and let your own kid drown. But no, we save our own kid first because the fact is we do at some deep level care about ourselves more. But then we feel guilty about it. I say, why the guilt? But that's different than saying in order to pursue my self-interest, I'm going to destroy you. I'm going to sacrifice you. I don't care about you. No. Ainran said, you shouldn't sacrifice to other people and you shouldn't ask other people to sacrifice for you. The way to deal with other people is what you call the trader principle. What you want in life are win-win relationships. Did you say trader principle? Trader. Trader. From trading. From win-win. So think about a trade.