Original sentence: China has supplied Pakistan with nuclear materials and expertise and has provided critical assistance in the construction of Pakistan's nuclear facilities.In the past, China played a major role in the development of Pakistan's nuclear infrastructure, especially when increasingly stringent export controls in Western Countries made it difficult for Pakistan to acquire materials and technology from elsewhere
Edited sentence: China has supplied Pakistan with equipment to enrich it's indegiious uranium to weapons grade.In the past, China played a major role in the development of Pakistan's nuclear infrastructure, especially when increasingly stringent export controls in Western Countries made it difficult for Pakistan to acquire materials and uranium enriching equipment from elsewhere