Is this supposed to be a reference to Chinese socialist posters?
While I have not seen this episode yet, let me chime in to confirm that this image looks awfully close to typical war propaganda posters. They do not have to be Chinese actually, Russians looked the same, as did those by Western countries at the time.

The drawing style was, as far as I know, mandated by the circumstance around the second world war, meaning they all look similar. The messages are also (maybe surprisingly) similar, as is the facial expression of energetically staring into the upwards, far distance.

The text in the example given is Japanese, which I sadly cannot read.

Chinese and Russian as well as other socialist propaganda made particular use of red colors:


(source)

For comparison, American propaganda from 1944 often used the same painting technique:

 (source)