Aerial photo taken on Aug. 12, 2019 shows a memorial hall marking the Long March by the Red Army on the Liupanshan Mountain in northwest China's Ningxia Hui Autonomous Region, Aug. 12, 2019. A total of 18 significant historical scenarios of the Long March were reproduced on the 2.5-kilometer-long "Red Army path" where visitors can retrace the history of the Long March and learn the Long March spirit. (Xinhua/Feng Kaihua)