Děng / dào / hé / tóng / qiān / wán / cái / fā / xiàn / bèi / piàn / zhēn / shì / huǐ / zhī / wǎn / yǐ

等到合同签完才发现被骗，真是悔之晚矣。

Realizing only after signing the contract that you were deceived—it is truly too late for regret.