China expressed "strong dissatisfaction" with India Thursday over the recent crash of an Indian drone in Chinese territory, an incident that could cause more friction along their disputed border.
The trips by Foreign Minister Wang Yi and State Councillor Yang Jiechi - more than three months after the worst border row between the two countries in almost three decades - showed that both Beijing and New Delhi meant to get ties back on track, observers said.
A spokesman for the Chinese Foreign Ministry said the drone crashed in the Sikkim section of China's border with India and that China has lodged a complaint with India over the issue.
Reports coming from Zhang Shuili, deputy director of the western theatre combat bureau, said that the incident took place recently. They fought a brief but bloody frontier war in 1962 and engaged in a 10-week standoff this summer high in the Himalayas over the Doklam plateau that is claimed both by China and India's ally Bhutan.
"The intrusion took place at the same location where a standoff broke off not too long ago between the Chinese and Indian militaries".
Although Chinese President Xi Jinping and Indian Prime Minister Narendra Modi agreed at a meeting in September to advance bilateral ties and leave the Doklam row behind them, tensions continue to simmer along the border months after the disengagement of troops on the plateau, known as Donglang in Chinese.
An Indian drone has reportedly "invaded China's airspace and crashed" on its territory this week.
The Indian army said the drone had been deployed on a training mission and developed a technical problem. "The action of the Indian side violated China's sovereignty and it's not conducive to the peace and tranquility of the border area". But the mountainous border remains sensitive for both sides.
Despite tensions between the two countries, there is no general ban on Chinese products in India, nor of Indian products in China.
India had objected to the construction highlighting its security concerns.