完璧归赵

战国时，赵得和氏璧。秦愿以十五城易之。蔺相如奉璧入秦，见秦王无意真偿城邑，乃持璧欲击柱，以死相胁，终使璧完好归赵。「完璧归赵」言物归原主而无损，亦赞使节之智勇——护的是国信，不只是一块玉。

In the Warring States, Zhao held the He Shi Bi jade; Qin offered fifteen cities in exchange. Lin Xiangru carried the jade to Qin, saw the king would not truly cede the cities, and threatened to smash the jade against a pillar rather than surrender it empty-handed. The jade returned to Zhao unbroken. The idiom means restoring something intact—and praises an envoy’s nerve: what he guarded was trust of state, not only a stone.

完璧归赵：承诺须可核验——空城不可换真璧。智在看穿交易结构，勇在以身押住底线。外交与谈判里，真正的「完」是原则未碎，不是面子好看。今日：签字前问清楚对价是否落地，而非只听漂亮话。

Returning the jade intact: a promise must be verifiable—empty cities cannot buy a real jade. Wisdom reads the deal’s structure; courage stakes a body on the line. In diplomacy and negotiation, “intact” means principle unbroken, not a pretty face. Today: before you sign, ask whether the counter-value actually lands—not only whether the speech sounds fine.