作法自毙

作法自斃
Zuòfǎzìbì
  1. to make laws or rules that harm oneself in the end
  2. to reap what one sows; to bear the consequences of one's own misdeeds

Wiktionary

Entry Composition

1 作法 zuòfǎ
  1. course of action
  2. method of doing sth
  3. practice
  4. modus operandi
2 自毙 zìbì to bring destruction upon oneself; to walk into destruction