The first one was put forward by some reformists in the Qing Dynasty after the Opium War 1840, represented by Wei Yuan, Lin Zexu, Xu Jishe and others. The time is 65438+ fifties and sixties. The second one was put forward by Chiang Kai-shek when he engaged in white terror after Sun Yat-sen's death. This was said from 1927 to 1936 before the Xi incident.

So it should be in the 1920s and 1930s.