evidence: In this way, China is encroaching, little by little, on vantage Indian land in the Chip Chap and Skakjung regions of Ladakh. Chumar in Ladakh was raided last September by helicopter-borne PLA troops, who destroyed Indian bunkers before returning. Arunachal officials are tired of complaining about New Delhi’s nonchalant attitude to aggressive PLA activities along their state’s border.