From Mao Zedong's 1961 poem 《
七绝·
为李进同志题所摄庐山仙人洞照》, inscribed on a photograph of the Immortals' Cave at Mount Lu:
天生一个仙人洞,
无限风光在险峰 — 'Heaven made this Immortal's Cave; the boundless vista lies on the perilous peak.' Now a stock line in Chinese motivational rhetoric.