WMG / Choukakou

Li Shimin is Chang Ge's real father.

It was Li Shimin who rescued Jiang on the battlefield, who was so vehemently opposed to having his niece be married off as a pawn at such a young age, and who was said to love her like a daughter when she was younger. Of course there's also the maidservants speculating about an affair when Chang Ge was young. Why mention all this if it's not going to be relevant?