万水千山屏 - （一）瑞金
Shanghai renmin meishu chubanshe (上海人民美术出版社)
After having been surrounded by Nationalist troops for the fifth time, the Communists had to abandon their main base at Ruijin (瑞金, South-East Jiangxi Province) in October 1934.
Nr. 1 of the poster set An arduous journey.
This is a print from the tenth edition (January 1965).