My Backyard Is the Tang Dynasty

After opening the ancient well in his own backyard, Li Yin's life changes from that moment on!

Sixth Prince Li Yin? Twenty-first-century shut-in Li Yin? Able to move freely between two worlds, which life should he choose?

Harem? Struggle for supremacy? Power politics? Is that all?

No! With the advantage of modern technology, he wants to build his fief into the world's economic center, and the world's map will be filled with colonies belonging to him...