The Happy Little Prince Consort of Time Travel

I am Yun Qi, a library director. I accidentally caught up with the time travel craze and came to a magical country that had never existed before in history. With the knowledge of a library, I became prosperous. The country is short of money? It doesn't exist. Look at how I can blow up the treasury. Oh, yes, I also have a strong eldest princess wife who is a complete husband-protector. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.