Chang An Unknown Space.

Mysterious crises occur one after another in the city of Chang'an, with viruses infecting humans like zombies, strange and gloomy underground caves, and treasures that have been rumored to reach the sky for thousands of years... The Taiping people headed by Ma Long protect Chang'an, going back and forth with various forces, and are in unknown situations again and again. In the bizarre adventure, more mysteries are waiting to be solved...