Yu Weimin didn't tell his system one thing. 520 was too naive to understand. So he didn't even bother telling her about it.
Aside from practicing self-love and striving to increase the intensity of self-love, there was one more thing. It was to face one's fears, the ugliest parts of their life, and still be okay with them. To make the father-son duo's relationship familial again, they would have to face one another's ugliest truths.
In short, he would have to show why the duo hated one another. Then make them realize that it was a stupid reason to hate someone. He was merely making himself a scapegoat for their good relationship into the future.
Digging up the past, torturing himself, and emotionally blackmailing were all on his list. So Yu Weimin wasn't worried about it anymore.