evidence: TAWANG, India — Prime Minister Narendra Modi had come to his country's most remote state, an unspoiled place of indigenous tribes and rain forests, to open its first railway station and boast of new development. [...] The status of Tawang has exacerbated the long-running dispute between the two countries, experts say. China has never accepted the McMahon boundary line drawn in 1914 that essentially placed Tawang in territory controlled by the British Raj. India, for its part, rejects China’s claim to a slice of the high Tibetan plateau several hundred miles to the west called Aksai Chin. [...] Tawang itself has the feel of an occupied city, with green barracks dotting the hillside and soldiers in fatigues mingling with monks in maroon robes in the bustling market square. Near Tawang, at altitudes higher than the clouds, yak herders and villagers gathering firewood fight for space alongside heavy military trucks on winding roads. Many of the residents still remember the short war between the neighboring countries in 1962, when the Chinese briefly occupied the area.