From Son-In-Law to Daxia Imperial Preceptor

[Funny and light-hearted jokes + The King of Hell's policy of governing the country + The heroine's back-story flow] Lin Fan traveled through the Great Xia to marry a son-in-law. He originally wanted to live a peaceful life, but due to a casual plan, he attracted the attention of the empress. Since then, there has been a Sai Zhuge in the capital, and an invisible prime minister in the court. His casual words can overturn the world's political schemes, and a whisper in his pillow can make the empress obey her words. Let's see how this son-in-law, relying on modern wisdom, guides the country from bed curtains to dragon chairs, and gains both power and beauty!