Geng said what happened in Doklam was a dispute.
Jaishankar, who on Tuesday was at the Lee Kuan Yew School of Public Policy in Singapore to deliver a lecture, said "differences should not become disputes".
Gang said: "China has pointed out many times that the illegal trespass of Indian border troops of the mutually recognised border line is different in nature from the frictions in the undefined sections of the boundary.
"The Sikkim section has a special historical background and this is only defined boundary between India and China. And this is totally different from the undefined boundary in the east, middle and west part.
"According to the 1890 convention, the Sikkim section has been recognised by both China and India and this convention is effective for both countries.
"We again request India to withdraw the border troops to the Indian side of the boundary and properly settle this dispute at an early date."
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