On Saturday, the 14th Dalai Lama is expected to hold spiritual discussions and impart his teachings in Tawang, a town in the northeastern Indian state of Arunachal Pradesh.
While the religious leader is seen as a thorn in China's side under ordinary circumstances, his visit to Tawang is being seen by Beijing as especially provocative because the town is part of the 84,000 square kilometers of Indian territory that China officially claims as its own.
China's Foreign Ministry warned a Tawang visit
would "gravely damage the peace and stability of the border regions between China and India, and China-India relations," adding on Wednesday
that by inviting the Dalai Lama to an area where China and India had territorial disputes, the Indian side had "violated its commitment on Tibet-related issues, and escalated the boundary dispute."
In the past, Beijing has called the Dalai Lama a "traitor," branding him "an anti-China separatist under the cloak of religion."
Manoj Joshi, a Tibet expert at the Delhi-based think tank Observer Research Foundation, says Tawang is one of the most important places for China when it comes to Tibetan affairs.
The Buddhist town is home to the revered Tawang Monastery, one of the largest outside Tibet's capital Lhasa, and is said to be the birthplace of the popular sixth Dalai Lama, Tsangyang Gyatso.
In traditional Tibetan belief, the title "Dalai Lama" is for the highest-ranking leader in Tibetan Buddhism. The title is given to those who are the reincarnations of a line of revered religious teachers.
Tawang is strategically important to China because its monastery is one of the hubs of power play in Tibetan internal politics -- and it is the Dalai Lama that appoints the head of this monastery.
China also cares what happens in Tawang because it claims it as its territory.
Tawang has history as a proxy battleground between great powers.
In 2016, then US Ambassador to India, Richard Verma, visited the area, sparking a diplomatic kerfuffle. At the time, China said the US would
"sabotage the hard-won peace and tranquility in the China-India border areas."
The Dalai Lama's last visit in 2009 also faced strong objections from Beijing.
"Having made one mistake does not give a permit to make another one. It is even more unacceptable to repeat mistakes," China's Foreign Ministry spokesperson Lu Kang said.