Claim: Ling Yun attended the Communist Party's "Northern Shaanxi Public School" established in 1937 to train anti-Japanese military and political officers, after graduating, he was posted at the headquarters where he joined and advanced in the ranks of the Central Department of Social Affairs led by Kang Sheng.
Evidence: Later, he moved to neighboring Shaanxi Province, where he studied at the "Northen Shaanxi Public School", which was established in 1937 by the Communist Party to train anti-Japanese military and political officers. After graduating, he was posted at the headquarters of the Communist Party in Yan'an, where he joined and advanced in the ranks of the Central Department of Social Affairs, led, at the time, by Kang Sheng.