Paul Muni and Luise Rainer
“The Good Earth” (1937) is based on the historical novel of the same name and centers on a family of farmers struggling in China.
The protagonists of the story Wang and O-Lan are — you guessed it — Chinese.
Wang is portrayed by Paul Muni and O-Lan is portrayed by Luise Rainer. Neither were of Asian descent. Both wore yellowface for their roles.