I actually appreciate that Sun is unsatisfied with his revenge. He's achieved what he wanted but his mother and brother are still gone. Revenge is sometimes overrated. But thankfully in his quest he did meet people who love him and want to be a part of his life and at the center of his new found family is a man he can spend the rest of his life with.

Possibly the funniest exchange in this drama:

the idiot is gonna be jealous of himself because he doesn't realise he is the one who put those marks on Gao Tu