Mao and the Fourth Red Army break the encirclement of the Jinggangshan and retreat across southern Jiangxi with the Guomindang in hot pursuit.
Link to map of Jiangxi province: https://www.chinamaps.org/china/provincemaps/jiangxi-province-map.html
Further reading/watching on the difficulties of finding good maps of China:
https://en.wikipedia.org/wiki/Restrictions_on_geographic_data_in_China
https://www.reddit.com/r/Maps/comments/b6qnvc/just_blew_my_mind_every_map_of_china_is/
https://www.reddit.com/r/China/comments/7pju2c/why_is_google_maps_coverage_of_china_slightly_off/
Further reading:
Stuart Schram, ed., Mao’s Road to Power, vol. 3: From the Jinggangshan to the Establishment of the Jiangxi Soviets, July 1927-December 1930
Pang Xianzhi and Jin Chongji, Mao Zedong: A Biography, vol. 1: 1893-1949
Agnes Smedley, The Great Road: The Life and Times of Chu Teh [Zhu De]
Stuart Schram, ed., Mao’s Road to Power, vol. 4: The Rise and Fall of the Chinese Soviet Republic, 1931-1934
Some names from this episode:
Chen Yi, Political commissar for the 28th regiment of the Fourth Red Army
Lin Biao, Battalion commander in the 28th regiment
Wu Ruolan, Communist cadre and Zhu De’s wife