gǔ dài / gù shì / lǐ / dāo xià liú rén / zǒng shì / chū xiàn / zài / zuì / wēi jí / de / shí kè古代故事里,刀下留人总是出现在最危急的时刻。In ancient stories, "spare the prisoner" always appears at the most critical moment.