Lede sorta buried on this one.

Even after twenty-one rounds of bilateral talks, the India-China border dispute remains unresolved. Nor is the frontier quiet. In the summer of 2017, a flare-up occurred at Doklam near the India-Bhutan-PRC tri-junction. The catalyst was an attempt by China’s People Liberation Army (PLA) to construct a road on the Doklam plateau, through disputed territory. Bhutan, which has a security pact with India, turned to New Delhi for assistance. India responded by deploying a contingent of forces to block the road building. That decision did not stem from altruism toward a weak neighbor but rather from the awareness that China, had it completed the road, would have been in a position to launch a pincer movement to cut India’s ground links to its northeastern states in the event of a war.
https://nationalinterest.org/feature...ht-china-46377