The succession of Tibetan spiritual leader, the Dalai Lama, is a thorn in China-India relations, the Chinese embassy in New Delhi said on Sunday, as India’s foreign minister prepares to visit China for the first time since deadly border clashes in 2020.

Ahead of celebrations this month for his 90th birthday that were attended by senior Indian ministers, the head of Tibetan Buddhists riled China again by saying it had no role in his succession. Tibetans believe the soul of any senior Buddhist monk is reincarnated after his death, but China says the Dalai Lama's succession will also have to be approved by its leaders.

The Dalai Lama has been living in exile in India since 1959 following a failed uprising against Chinese rule in Tibet, and Indian foreign relations experts say his presence gives New Delhi leverage against China. India is also home to about 70,000 Tibetans and a Tibetan government-in-exile.

Yu Jing, a Chinese embassy spokesperson, said on social media app X that some people from strategic and academic communities in India had made "improper remarks" on the reincarnation of the Dalai Lama.

Yu did not name anyone but in recent days, Indian strategic affairs analysts and a government minister backed the Dalai Lama's remarks on his succession.

"As professionals in foreign affairs, they should be fully cognizant of the sensitivity of issues related to Xizang," Yu said, using the Chinese name for Tibet.

"The reincarnation and succession of the Dalai Lama is inherently an internal affair of China," she said.

"(The) Xizang-related issue is a thorn in China-India relations and has become a burden for India. Playing the 'Xizang card' will definitely end up shooting oneself in the foot."

Indian Parliamentary and Minority Affairs Minister Kiren Rijiju, who sat next to the Dalai Lama during the birthday festivities a week ago, has said that as a practising Buddhist, he believes only the spiritual guru and his office have the authority to decide on his reincarnation.

India's foreign ministry said on July 4, two days before the Dalai Lama's birthday, that New Delhi does not take any position or speak on matters concerning beliefs and practices of faith and religion.

I think it's important that we have a consistent position, which Australia has had for a long period of time.

Indian External Affairs Minister S Jaishankar will be attending a regional security meeting under the Shanghai Cooperation Organisation in Tianjin in northern China on July 15 and hold bilateral meetings on the sidelines.

This will be one of the highest-level visits between India and China since their relations nosedived after a deadly border clash in 2020 that killed at least 20 Indian and four Chinese soldiers.

Late last month, India's defence minister held talks with his Chinese counterpart in China on the sidelines of a defence ministers' meeting of the Shanghai Cooperation Organisation.