A: Impressionists have a strong interest in light and color. They think that light and color are the purpose of expression, and the vividness and beauty of the universe and everything belong to light and color. Impressionist works are bright and refreshing; Every second of the picture embodies the artistic style of harmony between vitality and light and color. Post-impressionism advocates the individuality of calligraphy and absorbs the characteristics of oriental art; Most of their paintings have rough lines, exaggerated forms, bright colors and decorative flavor.