According to historical records, the Soviet Red Army was interested in two things in Northeast China: eating jiaozi and playing with sister-in-law. ?

This is a Soviet proverb: delicious but not jiaozi, fun but the origin of my sister-in-law

Not as delicious as upside down, nor as delicious as jiaozi-more authentic.

Not as good as jiaozi, but as fun as my sister-in-law-this is an extended version.

Tasty but meat buns, fun but sister-in-law-this is the above variation.