In fact, the reason for the continued ambiguity is that, in 2002, after more than two decades of negotiations, China reneged on a promise to exchange maps with India covering the two main disputed sectors – the Austria-size Arunachal Pradesh and the Switzerland-size Aksai Chin, along with its adjacent areas – located at either end of the Himalayas. Four years later, China revived its long-dormant claim to Arunachal Pradesh, and has since breached its border several times.