Revealing his identity to Xia Wanqing was because Huangfu Yuxuan suspected that people from Haotian Village had already discovered his true identity.
After all, in the Capital City, his identity can be concealed—not impossible to conceal—but that would only fool outsiders temporarily, so he might trick the people sent by Haotian Village to investigate for a while, but not indefinitely.
He wants to take the initiative and gain a reputation for sincerity.
As for why he deceived and concealed before, there's no need for explanation; hiding his identity was normal.
As for why Prince Liang would lower himself to meet Xia Wanqing, it's even simpler.
For Huangfu Yuxuan, Prince Liang as a father is more of a pawn than a father.
Prince Liang fears him like a tiger.
And now, in his foolish mind, Prince Liang is still thinking of becoming the Crown Prince again, placing all his hopes on him, so he obeys his every word.
