Zhang Dongyun traveled through time with an invincible city system. As a city lord, as long as he is within the scope of the invincible city, he is invincible. No existence can harm Zhang Dongyun, and he can dominate the life and death of all living creatures in the city. Moreover, this city will continue to Upgrade and continue to expand. One city covers a country, one city encompasses a realm, until one city encompasses all heavens and all realms... From then on, this world welcomes its only supreme, supreme master, and the father of everyone, forever. god.