However, it said that since there is no commonly delineated Line of Actual Control (LAC) between India and China, "transgressions" occur on account of both sides patrolling up to their respective perceptions of the LAC.
In a written reply, Defence Minister Manohar Parrikar also said that China is carrying out infrastructure development including upgrading and construction of roads up to and along LAC.
"There is no commonly delineated LAC between India and China. There are areas along the border where India and China have differing perception of LAC. Transgressions occur on account of both sides undertaking patrolling up to their respective perception of the LAC," he said.
Parrikar said that government has seen reports of incidents involving China and other countries in South China Sea and East China Sea.
India has, on several occasions, reiterated its position that it supports the freedom of navigation in international waters including the South China Sea, the rights of passage and unimpeded commerce in accordance with accepted principles of international law and peaceful settlement of maritime disputes, he said.
Talking about LAC, he said government regularly takes up any transgressions with the Chinese side through established mechanisms including border personnel meetings, flag meetings, meetings of the Working Mechanism for Consultation & Coordination on Indo-China Border Affairs and diplomatic channels.
"Government regularly reviews the threat perception to secure our borders and protect national interest. Appropriate measures are taken from time to time to maintain/upgrade the country's defence preparedness along the border to safeguard the sovereignty, territorial integrity and security of India," he said.
Parrikar also said the government was seriously considering establishing a hotline between the military headquarters of India and China.

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