China's latest move to rename 30 places in India's Arunachal Pradesh, claiming it as "Zangnan," has sparked outrage. India's External Affairs Ministry slammed the "preposterous" act, asserting Arunachal's undeniable status as an integral part of India. Why is Beijing, Pakistan's all weather ally, doing this at a time when relations between India and China were on the mend? Do these claims have any impact? Former Indian ambassador to China Sanjay Bhattacharyya answers.