Ming Dynasty rescue plan from King Xin

At the end of the Ming Dynasty, the little ice age came, and natural disasters ate people year after year; Peasant uprising, war erosion, no peace; After Jin's invasion, the Chinese artifact will change its owner; With the rise of Western barbarians, the world has changed an experimental accident caused an earth shaking explosion in the sixth year of the apocalypse, and also brought new hope to the Ming Dynasty... how should people who pass through save China, turn the world around and change the trend of history?