China is a country who has a lot of ambitions and expansionist policies and is always seeing if an inch of land can be grabbed this side or that side. Japan, Mangolia, India and all other neighbouring countries know it well. China has a policy of developing the roads to the border on all the sides of their country boundary and the basic intention behind that is to quickly transport the army there when the war or war situation arises. After the annexation of Tibet by China there has been a phenomenal development in the region and roads and railway lines have been laid down very nicely by them. China has a big labour force and to occupy them and keep them in employment, they go on building roads and other constructions in the country as well near the boundaries. Arunachal Pradesh wherever it is touching or is near to their boundaries, they will do the same thing - make roads for army movement. China believes in the policy of - offence is best defence.
Knowledge is power.