tā / shǐ le / gè / kǔ ròu jì / gù yì / shòu shāng / lái / piàn qǔ / duì fāng de / xìn rèn

他使了个苦肉计，故意受伤来骗取对方的信任。

He used a self-injury ruse, deliberately hurting himself to win the other side's trust.