lit. one move is not as good as standing still, meaning not to take action until one can clarify if any moves are of any value
Definitions (粵典–words.hk)
語句
勸人唔好去做某啲冇把握或冇價值嘅嘢好過 to take no action until one can clarify if any moves are out of confidence or of any value; literally: one move is not as good as staying still