Two slogans were put forward: "the time to learn from foreigners and master their skills in controlling foreigners" and "the time to settle down when you are busy outside"

The first view was put forward by the Qing reformers after the Opium War, 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. Before the Xi incident, it was 1927 to 1936.

So it should be the 1920s and 1930s.