For Liang Su, the most regretful thing was provoking Ye Yuan; for Ye Yuan, the most regretful thing was not knowing how to cherish things when he was young and frivolous.
The happiest thing for Liang Su is to meet Ye Yuan again; the happiest thing for Ye Yuan is to get Liang Su again.
Sometimes, we meet the right person at the wrong time, leaving only regrets; sometimes, we have to lament that fate will allow us to meet the right person again at the right time...