The three major professional ethics of killers: 1. Never steal business.Killing people is not so fun, and making money is not this way of making money. 2. If relatives and friends are killed, never seek revenge from colleagues, nor force colleagues to reveal the identity of their employers. 3. Keep a good mood and never say "this is the last time". The Three Laws of Killers: 1. You can't fall in love with the target, and you can't fall in love with the client. 2. Never disclose the client's identity.Unless the client wants to kill himself. Three, after work is not a killer.Keep this in mind even when you're drunk, asleep, or having sex.