Ruijin (瑞金) is often considered the cradle of the Chinese Communist Revolution. After being forced out of the Jinggang Mountains , Chinese Communist forces regrouped in Ruijin. In 1931, Mao Zedong proclaimed the Chinese Soviet Republic , with Ruijin as its capital. The Communists eventually withdrew from the city during the Long March after being surrounded by Nationalist forces. Today, Ruijin remains a popular destination for “red tourism,” referring to sites significant to the history of communism in China. It also attracts visitors interested in nature and ecotourism, as well as some ideological pilgrims from China and abroad. The photo on the front of the card is of Qianshan Mountains (千山), a scenic mountain range in northeastern China. The highest peak in the range rises to about 1,336 metres.

The sender is from Xinyu. Its a beautiful card but not a word of English on it so I'm not sure what the photo is. 

Shangrao  上饶市 is a city of 6.5 million people. Three major railways pass through Shangrao - the Shanghai-Kunming Railway, the Shanghai-Kunming High-Speed Railway, and the Hefei-Fuzhou High-Speed Railway.  The Shanghai-Kunming Railway (Hukun Railway)  滬昆鐵路 is a major arterial railroad across eastern south central, and southwest China. It connect Shanghai and Kunming. It is almost 2700 km long and passes through 15 major cities.  Between Shanghai and Zhuzhou, the speed limit is 200 km/h/. Between Zhuzhou to Huaihua, the speed limit is 120 km/h. The entire line is electrified.  The Shanghai-Hunming High-Speed Railway runs parallel to the Shanghai-Kunming Railway, but does pass through four more provncial capitals - Hangzhou, Nanchang, Changsha, and Guiyang. The total length of the line is 2066 km.  The construction company was found to commit fraud and illegal subcontracting. Because of this, some sections were found to be dangerous if the trains were travelli...