As a master of Chinese painting, he is famous for his meticulous brushwork. Beautiful lines, delicate pen, proper ink, colorful and very rich. Double-hooked bamboo chrysanthemum, stacked leaves and cores, not messy. Full of golden ladies, colors and paints, even and beautiful. So even though it is a small fan, it will take several days. Painting monkeys and squirrels is his unique skill, so he is called "Cai Mang" or "Cai Squirrel", and he often laughs it off. Painting figures, copying Fei and Jiang Xiaoquan's works also have charm. Calligraphy can be relaxed and has the charm of Yunnan days. Five works created by 1937, such as Sunset Returning to Fishing, Squirrel, Washing Horse, Flower and White Rabbit, Imitation of Yang or Boneless Landscape, have participated in the Paris International Expo and won favorable comments. After the founding of the People's Republic of China, there were more than 20 representative works, such as Monkey Tour, Peony, Spring in the Woods, Squirrel, Autumn Color, Hundred Fruits, and Picture of a Lady, which were exhibited in national, eastern, provincial and municipal exhibitions.
Cai Zhenyuan is frank and honest, and he usually keeps close contact with painters such as Liu Linchuan, Gu Yanping, Chen Jialu and Yan Chunsheng, and learns from each other. He also founded Suzhou Traditional Chinese Painting Research Association with Liu and others to cultivate artistic talents.