Cheng Nianshan thought that by spending half his life protecting him, he could get him to look back. In the end, she found out that it was a delusion after all. She could not forget everything about him, but he never remembered her goodness. You can't look back on things in this world, just like you can't regret in life, so Cheng Nianshan has no regrets. She just wants to take advantage of the opportunities stolen from the world to continue to repeat what she has done for many years. But she couldn't figure out why she persisted.
Intention: Life will not give people a chance to regret. Regret is just because you can't let it go.