"Population education hanging charts" (Renkou jiaoyu gua tu, 人口教育挂图), designed by the Jiangsu jiaoyu xueyuan (江苏教育学院) and the Jiangsusheng dianhua jiaoyuguan (江苏省电化教育馆), is a series of 18 sheets. The series comes with an explanatory booklet, and was sold in a plastic bag.
It comprehensively deals with the effects of (over)population, reproduction, and the need to try and curb population growth.
The slogan reads "The principle of birth control" (节制生育的原理).
Top right, "The principle of birth control" (节制生育的原理).
