On the eve of his visit to China, External Affairs Minister Pranab Mukherjee on Tuesday made it clear that Arunachal Pradesh is not disputed and that India will not give up its right over it.

Talking to reporters in Chennai, he acknowledged that Chinese troops have been indulging in incursions and that Indian security forces had been asked to be alert and maintain vigil along the border to stop such intrusions.

Mukherjee said boundary issues between India and its neighbours are very complex and settlement of these take a long time internationally.

On Arunachal Pradesh, he said though China has claimed that the state is its territory, India had told the international community that it was an integral part of the country.

"We have a democratically-elected government there and there is no question of giving up our right," he said.

While China had disputed McMohan line created in 1914, India had accepted it as the natural boundary, he said.

After both the countries accepted the Line of Actual Control, tension had reduced substantially since 1995 in all sectors, he said.

Mukherjee will be traveling to China on Wednesday on a four-day visit, during which the boundary issue is expected to be discussed.