The train has departed from Shanghai (上海).

The text in the image reads:
It is absolutely necessary for the educated youth to go to the countryside to receive re-education from the Poor and Lower-Middle peasants
Zhishi qingnian dao nongcun qu, jieshou pinxiazhong nongde zaijiaoyu, hen you biyao (知识青年到农村去，接受贫下中农的再教育，很有必要)

The slogan on the train reads:
Always learn from comrade Jin Xunhua
Xiang jin xunhua tongzhi xuexi (向金训华同志学习)