If Prince Pingliang is really his elder sister, then given his sister's affection for him, maybe a princely title...
Ahem, a throne can pass from brother to brother, so a princely title passing from sister to brother doesn't seem impossible.
Tian Yaozong showed a dreamy smile, fantasizing that he successfully recognized his relatives and became Prince Pingliang's most beloved younger brother, with wealth and luxury, fine horses and beautiful women all within reach.
Not only was Tian Yaozong daydreaming, even Mr. Tian was quite moved by his son's words.
Indeed, Prince Pingliang's situation seems so close to their own Daniu's?
If there's a female prince's real daughter, then, could he also be a "Supreme Emperor"?
"Dad, actually it's simple to confirm whether Prince Pingliang is my elder sister or not."
