Summon the Saint Ancestor at the Beginning to Create a Mythical Empire

The country is in danger, the prince made money and ran away before ascending the throne, and the third prince Xie Mosi was pushed to the throne. All the people are living in dire straits, and powerful foreign enemies are watching! ! Ding dong! Activate the Supreme Kingdom System. Summon the Saint Ancestor. Start a zombie craze. Build the Great Wall. Achieve the cultivation of a great emperor. Step by step, reach the top.