Great Collapse

The Great Collapse (世界大崩慌), also known as the Second Great Depression, is a global economic and social collapse that affected the political landscape and millions of lives of many nations across the world. It lasted from 2020 to the start of World War III in 2028, though its effects are most apparent from 2025 to 2028.

Trivia
This seems to be a reference to the Great Depression (August 1929 – March 1933)