ㄍㄨㄤguāngㄕㄨㄛshuōㄅㄨˋㄗㄨㄛˋzuò

  1. 空談實際行動信口開河光說不做行為事情沒有幫助。」光說不練」。不行

all talk and no action (idiom)​, to preach what one does not practice