India made clear its opposition to China's participation in projects in Pakistan-administrated Kashmir, saying it treats any such activity as ‘illegal'. External Affairs Minister S M Krishna said India has also taken up with China the matter relating to issuance of visas to Kashmiris on loose sheets instead of passports and asked it to apply uniform visa norm for all Indian nationals, reported PTI. “Jammu and Kashmir is an integral part of India. Any activity by any country in Jammu and Kashmir is illegal and this has been made known to all concerned,” Krishna said in response to a question about Chinese participation in developmental projects in Pakistan administrated Kashmir. China is assisting Pakistan in building a mega power project and construction of a highway in Karakoram Range in Pakistan administrated Kashmir.