From 《
三国志·
蜀志·
诸葛亮传》 and Pei Songzhi's citation of 《
汉晋春秋》: during Zhuge Liang's 225 southern campaign he captured the Nanzhong chieftain Meng Huo (
孟获) seven times and released him each time until Meng Huo submitted wholeheartedly. Per Xinhua:
比喻运用策略,
使对方心服 — 'a metaphor for using strategy to win true submission'.