The second scene is the subway station, perhaps this is the first scene that is accessed by the train.
The fourth level is a cross-sea bridge, maybe that scene is related to the Ark. The fifth level is an ocean liner, which should be traveling to a seaside city.
Thinking about this order, Wen Xishu realized that the further he progressed, the younger Ding Dong was in each level.
The research institute corresponds to Ding Dong's childhood, and the city ruins are when Ding Dong took Granny Wu and others to find a pure land.
So the twelfth level, this small town between the grassland and the blue sky, and the church and welfare home on the mountainside... Does this correspond to Ding Dong when he was still a young child?
Suddenly, a flock of sheep appeared in the sky.
Yes, a flock of sheep in the sky. They floated very low, tightly packed together like cotton, resembling a writhing cloud.
Zheng Zai and Wen Xishu were both startled, Zheng Zai thought this was so damn weird: