After the 1934-35 Long March, Yan'an served as the CCP's rural headquarters from 1937 to 1947 — where Mao wrote On Contradiction, On Practice, and the Yan'an Talks on literature. 'Yan'an spirit' (
延安精神) remains a foundational brand in PRC political discourse. The city's yellow-loess hillside caves (
窑洞) are a major red-tourism site.
