Professor Yeung Yuk Fung confirmed that Nanshe Shihua’s author, though credited as Manzhao, was Wang Jingwei in the preface he wrote for the volume Wang Jingwei Nanshe Poetry. In addition, he pointed out that the Manzhao for whom Wang wrote a poem as an inscription for a painting  (see p. 96 in Wang Jingwei Poetry - Newly Edited of the series Wang Jingwei & Modern China) was another person. Professor Yeung wrote:

According to materials I collected, there was an artist in the 1940s named Li Manzhao, who had his works, chiefly comics and woodcuts, published in journals at the time. This artist Li Manzhao is very helpful in our understanding of who Manzhao was in Wang’s poem.

Professor Yeung listed five works by Li Manzhao’s, and noticed that the publications where they appeared closely were related to Wang Jingwei. Hence, he deduced that the Li Manzhao who had published his comics and woodcuts in Shanghai publications was most likely the artist for whom Wang wrote the poem.

We have now found the art works listed by Professor Yeung as follows:

1: Unemployed family, signed Manzhao, Issue 2, “Comics Monthly” p. 3, June-July, 1941.

2: Let’s shoulder this holy responsibility, signed Li Manzhao, Issue 2, “Comics Monthly” p. 17, June-July, 1941.

3: Metropolitan scenes, Four comics, signed Li Manzhao, Issue 31, “Wing On Monthly,” p. 32, January 1, 1941.

4: Setting off, Woodcut, signed Li Manzhao, Vol. 1, Issue 3, “Chunghwa Pictorial” p. 27, October 1, 1943.

5: Rest, Woodcut, signed Li Manzhao, Vol. 1, Issue 3, “Chunghwa Pictorial” p. 27, October 1, 1943.