In 1922, at the invitation of Liu Haisu, he taught Chinese painting at the Shanghai Art College for several years.
After 1930, he successively served as a professor at Shanghai Xinhua Art College, Shanghai Changming Art College and Shanghai China University of the Arts. In addition to teaching, he often sought help from seniors such as Zhu Qiangcun, Zhu Zongyuan, Feng Junmu, etc., and his poetry and literary attainments continued to improve. He also organized the Bai Society with Brother Zhong Wen Yun, Jiang Danshu, Zhu Qizhan, Pan Tianshou, Zhang Shuzhan, Wu Mingzhi, Zhang Zhenduo and others to study painting skills.
In 1936, "Xizhai Yincun" was published. The following year, Japan fell into Shanghai. Mr. Lesan moved to Yuanling and taught successively at the National Art College and Linzhong Linshi in West Zhejiang. After the victory of the Anti-Japanese War, he returned to Shanghai to teach.
In 1946, he applied for a professorship at the National Hangzhou Art College (the predecessor of the China Academy of Art) and taught courses on flower and bird painting, calligraphy, seal cutting, painting theory, poetry and inscriptions. In the following year, books such as "Collection of Paintings by Mr. Zhu Lesan", "Selected Poems on Paintings by Xizhai" and "Copy of Poems by Xizhai" were published.
After the founding of New China, he insisted on inheriting and carrying forward the national culture. In the 1950s, together with Pan Tianshou and Wu Fuzhi, he made contributions to the reconstruction and development of the Chinese Painting Department of the Zhejiang Academy of Fine Arts. In the early 1960s, he prepared to establish the calligraphy and seal cutting major of the Academy of Fine Arts and took the lead in training the first generation of graduate students in my country.