From Mao Zedong's 1925 poem 《
沁园春·
长沙》 (Qìnyuán Chūn: Chángshā):
曾记否,
到中流击水,
浪遏飞舟 — 'Do you still remember how we swam out into midstream, the waves stopping the flying boats?' Written of his student days swimming in the Xiang River; the line is now stock rhetoric for boldness in the face of generational challenges.