There are two “Eight Model Opera” books hanging on the wooden pole behind the man. You can see one here.
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The children’s badges read 红卫兵 “Red Guard” and the image on the floor reads, 我爱北京天安门 “I love Beijing Tiananmen.” The poem of the same name in the top righthand corner is below.
The Chinese name 蒸蒸日上 is an expression that literally means, “steaming days better”. It is an expression that carries the idea that things get better through steaming, such as steamed foods. The character 蒸，means to cook by steam.
Changbai refers to 长白山 the Changbai Mountains located in the Northeastern province of Jiling 吉林 near the North Korean border.