Pakistan was given the technology by the Americans in the first place and later the Chinese added to it to counter India.
Pakistan got the centrifuges from the Chinese through North Korea and Pakistan helped North Korea to develop the enriched uranium, were mister A.Q.Khan from Pakistan enjoyed his hands on the latest tech at that time to develop his knowledge and he later gave this centrifuges to IRAN........
Totally wrong! Canada delivered Kanupp and France was building Chashma Nuclear Plant but abandoned it under US' pressure in 1979. Dr AQ Khan was working with Urenco in Alemelo, Netherlands as a metallurgist and nuclear scientist specialised in uranium enrichment technology. He brought the blueprint to Pakistan, built KRL at Kahuta and launched HEU programme between 1975-76.
Pakistan was already working on a plutonium programme and had acquired more than 80% of the required technology and sensitive tools to build the bomb. We were merely two years away from completing it till AQ Khan took over.
Gas centrifuges were imported from Germany and Switserland, not North Korea. Pakistan needed a delivery system as the AQ-5 Fantan was an obsolete bomber and mirages had no nuclear capability. Khan sold uranium enrichment technology to the Koreans in trade for full tot of Nondong missiles wich would be later modified and developped into a nuclear capable missile. Korean missile technology helped us develop the first generation of missiles. Pakistan did not sell enriched uranium to Notrth Korea or to any other country.
The Iran affair was for Khan's personal gain as we had built the HEU warhead in 1984 already and Khan was told to work on a range of missiles.
The abandoned Chashma Nuclear complex was picked up by China in mid eightees and statted operations in early nineties. The complex now exists of two 300MW reactors, a third 330MW has been.completed and will start operations in few months. Two.more 330MW reactors are under construction and expected to be completed in 2016-17.
The plutonium programme was picked up again in the nineties as we realised that dilivery system of the bigger and heavier HEU warheads would remain a challenge. We started building Khushab experimental heavy water reactor with Chinese help.and completed the 50MW plant in mid nineties. Now the complex has five heavy water plants, two operational and three under construction.