evidence: Dalai Lama’s birthday in the Demchok sector close to the Line of Actual Control (LAC) last week. [...] Demchok is one of the 23 "disputed and sensitive areas" identified on the LAC, stretching from eastern Ladakh to Arunachal Pradesh, which witnesses frequent "transgressions and troop face-offs" between the two armies due to "differing perceptions" of the unresolved boundary. The other disputed areas in Ladakh include Trig Heights, Dumchele, Chumar, Spanggur Gap and Pangong Tso. PLA troops, in the garb of nomads with cattle, had intruded around 300-400 metres inside the Demchok sector to pitch five tents in the Cherdong-Nerlong Nallan area in July last year. The PLA subsequently removed three of their tents after brigadier-level talks between the two armies.