China on Tuesday said it is "strong dissatisfied" with India over the Dalai Lama's visit to a disputed China-India border region.

"The Indian side allowed the Dalai Lama to visit the disputed eastern section of the China-India border regardless of China's grave concerns, and China is strongly dissatisfied with this," Foreign Ministry spokesman Qin Gang said at a news briefing.

Reports said the Dalai Lama arrived at the so-called "Arunachal Pradesh", a disputed region of the China-India border, on Sunday.

"We firmly oppose the Dalai Lama's visit to the region," said Qin. The visit "fully exposes the Dalai Lama's separatist nature."

"His attempt will not succeed," Qin said.