全面从严治党
to practice/exercise strict self-governance in every respect
to exercise full and strict governance over the Party
to strengthen Party self-governance
to strengthen Party self-discipline
例句：办好中国的事情，关键在党，关键在坚持党要管党、全面从严治党。
——摘自习近平在庆祝改革开放四十周年大会上的讲话，2018年12月18日
译文：China's success hinges on our Party, so we must ensure that the Party exercises effective self-supervision and practices strict self-governance in every respect.
– from the speech at the conference celebrating the 40th anniversary of reform and opening up, December 18, 2018
