What is a sunny day?

It should not be an independent phrase. Climb the tall building and overlook the higher sky. So it should be the sunset that makes the sky deeper, and the specific outline is difficult to determine.

The first sentence is: if you live deep in the city, it will be clear in spring and summer. A person lives a quiet life, overlooking the city, and finds that spring has passed, but summer is still cool.

Please forgive me if there is anything wrong. But I still admire Li Shangyin's poems.