What yusufzoi meant that borders between Pakistan and India will disappear and that will allow any Indian to come into the land of Pakistan without a visa and passport, which is not going to happen.
Cross border trade is fine when you have documents when entering the border security checkpoint. Not any regular indian ravi can enter Pakistan.
International borders will always be monitored by our border patrol. You indians will always remain foreigners to us, and we Pakistanis will always remian foreigners to you. Without a valid visa and passport, an Indian can not enter Pakistan and without a valid visa and passport a Pakistani can not enter India.