draw a clear line of demarcation
to draw a clear line of demarcation; to make a clear distinction
2. Set a clear line of demarcation in defining bureaucrat-capital; do not designate as bureaucrat-capital and do not confiscate all the industrial and commercial enterprises run by Kuomintang members.
First and foremost, we must draw a clear line of demarcation between socialism and feudalism and never allow anyone to oppose socialism under the pretext of opposing feudalism or to use the kind of phoney socialism advocated by the Gang of Four to promote feudalism.