The depiction is of a man with slanted slit eyes running with chopsticks in a bowl of rice, wearing a pointed hat and what appears to be Japanese geta.
(The original image also had him with a queue and with yellow skin, and referred to him as "Chinaman" instead of "Chinese man".)
This was part of the negative racist depictions common in that era.
You can see other places where Seuss used slanted slit eyes, like his WWII cartoons depicting Japanese-Americans as 5th columnists - https://apjjf.org/2017/16/Minear.html .
(The original image also had him with a queue and with yellow skin, and referred to him as "Chinaman" instead of "Chinese man".)
This was part of the negative racist depictions common in that era.
You can see other places where Seuss used slanted slit eyes, like his WWII cartoons depicting Japanese-Americans as 5th columnists - https://apjjf.org/2017/16/Minear.html .