"Post disengagement from the face-off in 2017, troops of both sides have redeployed themselves away from their respective positions at the face-off site. The strength of both sides have been reduced," she said replying to a question on the issue in Rajya Sabha.
"In order to maintain these troops during the winter, People's Liberation Army (PLA) has undertaken construction of some infrastructure, including sentry posts, trenches and helipads," she said.
Sitharaman's reply today came in response to a question on whether satellite images have revealed that China has constructed seven helipads in Doklam besides deploying tanks and missiles in the area.
On whether India has taken up the matter with China, she said issues relating to the border are regularly taken up with the Chinese side through diplomatic channels and at Border Personnel Meetings, flag meetings and meetings of Working Mechanism for Consultation and Coordination on India-China Border Affairs.
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Sources said China has been keeping its troops in north Doklam and significantly ramping up its infrastructure in the disputed area.
In January, Army Chief Gen. Bipin Rawat had said the time had come for India to shift its focus from borders with Pakistan to the frontier with China, indicating the seriousness of the situation.
To a separate question on a Pentagon report which said China was setting up a military base in Pakistan, Bhamre said the government keeps a constant watch on developments having a bearing on India's security and takes measures to safeguard it.
He said India and China have, on several occasions, reiterated that as large neighbours following independent foreign policies, the relationship pursued by the two nations with other countries must not become a source of concern for each other.
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