The female protagonist is one-on-one, the male protagonist is a prince, and the female protagonist is a former architect after time travel, and then becomes an official after time travel.
Yu Fei (the heroine), who was buried in the 21st century, survived in Zhongnan Kingdom, a country with a lot of talents headed by architecture. While he was developing his talents, fate deliberately played a trick on him, and the military knowledge he showed actually made the leader of Yun Kingdom want to seize talents. He actually used his son as bait, and he didn't know whether the son of the leader of Yun Kingdom was sincere or fake, and actually agreed to marry a person he had never met. And is it really okay for the son of the king to be such a monster?