Revolutionary historical view: the revolution from natural force to steam force (mechanical force) was realized for the first time, and the revolution from steam force to electric power was realized for the second time.

Global view of history: for the first time, the global market was initially formed. The second time, the global market finally formed.

Historical view of civilization: the first time is an open industrial civilization, and the second time is an open modern civilization.

View of modern history: for the first time, it greatly promoted productivity and modernization, and for the second time, mankind gradually realized modernization.