Star Rail City: Buried beneath the modern city are the "Tian Yuan Nodes" corresponding to the twenty-eight constellations. Each subway station is the entrance to the Star Gate.
God's agent system: God's agents need to wear "Heaven's Secret Chain" to suppress divine power. Excessive use will lead to star eclipse (crystallization of body parts)
Ecology of ancient mythical beasts: Green Dragon Palm Spring Thunder, White Tiger Si Qiu Xing, Suzaku Yu Xia Yan, Xuan Wu Zhen Dong Ming, each transformed into a human form and lurked in the four major weather bureaus
