It was exactly at that time ,in 1917 and 1919 ,two major events took place in Russia and China,that is,the October Revolution of Russia and the May 4 movement of China.

• 正在这时，一九一七年和一九一九年，俄国和中国发生了两件大事，这就是俄国的十月革命和中国的五四运动。