These are unedited Sino-Soviet propaganda posters. With their insistent and repetitive slogans of “Always together!” and “Friends forever!” and the aggressive hand-holding and hugging, I gotta say the Russian and Chinese guys in these posters seem like quite the committed couple.
They have kids and everything! Look at their little blended family.
They love working together, relaxing together, and reading the works of Lenin to each other. On weekends they garden in their matching overalls.
Rainbow flags would almost be superfluous.