Emperor Chongzhen did not hang himself, but moved south to establish the "Nanming Science and Technology Court". He accidentally obtained the complete copy of "Tiangong Kaiwu" and started a counterattack centered on "saving the country through science and technology". This is using the hard-core Ming Dynasty technology tree to leverage the tragic history of civilization's self-rescue. In the end, I found that it was much easier to save the country in the physical sense than to save the rotten system and people's hearts.