Seeking a novel title

It was a novel that he had read a few years ago. It was a novel that traveled back in time. The title of the novel had the character Mei. He only remembered that the male protagonist's name had the character Xiao. He had forgotten the name of the female protagonist. However, the female protagonist was very ugly at first. Later, she studied medicine and her face recovered. However, she kept pretending to be a pig to eat a tiger. She deliberately left black things on her face and needed a special kind of thing to wash them off. Later, the male protagonist and the female protagonist got married. However, soon after, the male protagonist went to the military camp. The female protagonist also disguised as a man and went to the military camp. The male protagonist thought he was gay. The male protagonist had seen the female protagonist's original appearance, but he didn't know that she was his wife. I don't remember what happened after that. I beg everyone ~

Answer 1

This novel was called " A Thought of Eternity ".