Complex sentence: At there he experienced several historical events of "Aftermath of World War I" that forever changed China and Sino-Japan relations, witnessed the "Rice Riot" of 1918 in Japan, and was influenced by impact of the 1917's Russian Revolution.
Split into simpler sentences: At there he experienced several historical events of "Aftermath of World War I" that forever changed China and Sino-Japan relations. He witnessed the "Rice Riot" of 1918 in Japan, and was influenced by impact of the 1917's Russian Revolution.