NEW : China lays claim to 90,000 square km ( 34,750 square miles ) of land in that mountainous region governed by India . China and India have a new system for cooperation on their border . Chinese diplomat says there is a huge potential for cooperation . The countries have border disputes dealing with an area near Jammu and Kashmir . China is India 's largest trading partner .
NEW : China and India have a new system for cooperation on their border . Chinese diplomat says there is a huge potential for cooperation . The countries have border disputes dealing with an area near Jammu and Kashmir . China is India 's largest trading partner .