Complex sentence: Quan's expressionist style in the 90s had a great influence on the young painters of the time, but, there is a contradiction to this influence as the natural moving force of art at that time ran counter to expressionist art in the west.
Split into simpler sentences: Quan's expressionist style in the 90s had a great influence on the young painters of the time, but, there is also a contradiction to this influence. The natural moving force of art at that time ran counter to expressionist art in the west.