Bhutan–China border

[13][14][15][16] A Chinese map published in 1961 showed China claiming territories in Bhutan, Nepal and the Kingdom of Sikkim (now a state of India).

Imposing a cross-border trade embargo and closing the border, Bhutan established extensive military ties with India.

[6] In the U.N., Bhutan, incidentally alongside India, voted in favor of the PRC filling the seat occupied by the ROC and openly supported the "One China" policy.

[4] In the 1980s, Bhutan relinquished its claim to a 154 square miles (400 km2) area called Kula Khari on its northern border with China.

[4][10] In 1996, China offered to trade Jakarlung and Pasamlung in exchange for a smaller tract of disputed area around Doklam, Sinchulumpa, and Gieu.

[19] In the agreement, China affirmed its respect for Bhutan's sovereignty and territorial integrity and both sides sought to build ties based on the Five Principles of Peaceful Co-existence.

[4][5][10] However, China's building of roads on what Bhutan asserts to be Bhutanese territory, allegedly in violation of the 1998 agreement, has provoked tensions.

[10][11] In 2002, China presented what it claimed to be evidence, asserting its ownership of disputed tracts of land; after negotiations, an interim agreement was reached.

[4] On 11 August 2016 Bhutan Foreign Minister Damcho Dorji visited Beijing, capital of China, for the 24th round of boundary talks with Chinese Vice President Li Yuanchao.

Both sides made comments to show their readiness to strengthen co-operations in various fields and hope of settling the boundary issues.

[26] On July 3, 2017, China told India that former Indian prime minister Jawaharlal Nehru accepted the Convention of Calcutta.

In the virtual meeting of the Global Environment Facility (GEF), China objected to a grant for the Sakteng Wildlife Sanctuary in eastern Bhutan's Trashigang District claiming that the area was disputed.