大開方便之門

Simplified: 大开方便之门

dàkāifāngbiànzhīmén ㄉㄚˋ ㄎㄞ ㄈㄤ ㄅㄧㄢˋ ㄓ ㄇㄣˊ

    • to make things easy for someone doing wrong
    • to open the door to abuse

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
throw wide the door of convenience
Meaning
Originally, to give all kinds of help; now mostly used critically, for making things easy for someone doing wrong.

Sources