"That night" back then was not a perfect full stop, but an "undefined ellipsis".
The reunion after many years is not to renew the relationship, but to settle things. Every time the eyes pull, you are asking the other person: "Is it because you have forgotten me a long time ago that you are living so decently now?"
Zhou Ping was once the only variable in her life. Now that he is back with some complicated purpose, he knows better than before how to use his charm to disturb Lin Shuyi's pond.