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.
China and India will resume suspended border talks soon, with top Chinese diplomats set for their first fence-mending visits to India since the military stand-off near the desolate Himalayan frontier.
Chinese border troops identified the device and were dealing with the matter in a "professional and responsible manner", the official Xinhua News Agency cited the deputy chief of the Chinese military's Western Theater Command, Zhang Shuili, as saying.
Four months after defusing Doklam stand-off, India and China have entered into another controversy over India's drone entering into the disputed territory near Sikkim on Friday, where both armies remained face to face for 64- days before returning to their bases.
The boundary talks were last held in Beijing in April previous year but suspended as frequent border patrol confrontations culminated in the 70-day military face-off along an unmarked border at the junction of Sikkim, Tibet and Bhutan.
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In its diplomatic protest to India, "China asked the Indian side to stop the activities of the devices near the border and work with China to maintain peace and tranquility of the border areas", he said. The road was being built by the Chinese troops in the area also claimed by Bhutan.
However, according to the Indian army, the drone had been "deployed on a training mission and has developed a technical problem".
"The action of the Indian side violated China's sovereignty and it is not conducive to the peace and tranquillity of the border area and China is dissatisfied with this and lodged solemn representation with the Indian side", Geng said.
In remarks carried widely by state media outlets, Zhang stated that the Chinese border forces had conducted "verifications" with regards to the drone.
As late as August, India had rushed troops to Doklam Plateau and although an immediate conflict was avoided, heated rhetoric on both sides has soured relations.