It's been a while since Cai has been back, and now he's angry. He doesn't want Cai to believe that Cai is trying to cover up his part in the murder of his sister. He's the one who murdered Cai's brother, and he'd be lying to Cai if he told the truth about what happened. Cai is going to be his common enemy, he tells us, because Cai has prejudiced himself against him no matter what he does. So, if Cai wants to cooperate with Cai, he should tell the truth. But if he wants to protect his sister, he needs to tell Cai the truth, and Cai will be the one to do it. Cai believes that Cai didn't intend to kill Cai, but that he wanted to punish himself for all the things he did that he did not want to do, and that's why he acted the way he did. Cai asks if he could trust Cai to do the right thing, but Cai says that he can't because Cai is a villain, and accepts the worst malice. Cai tells us that the bullet that Cai shot hua rauan has not yet been taken out, because it's a special bullet that has a "microlocator" , which means that it can only be removed from an accident. Cai also asks if his mother is in another lab, and she says she's never seen her mother before.