China has deployed more advanced and survivable solid-fuel nuclear capable

China has deployed more advanced and survivable solid-fuel nuclear capable CSS-5 MRBM missiles against India as a 'deterrent posture', Pentagon has said warning that a high degree of mistrust continues to strain their bilateral ties.

The PLA has replaced liquid-fueled, nuclear-capable CSS-2 IRBMs with more advanced and survivable solid-fueled CSS-5 MRBM systems to strengthen its deterrent posture relative to India, the Pentagon has said in its annual report on Chinese military build up to the Congress.

The report also says that Beijing is pumping in huge investments on border infrastructure developments laying more roads and rail network along the Sino-Indian border.

"Although this construction is primarily aimed at facilitating economic development in western China, improved roads could also support PLA border defense operations," it said.

Pentagon said that New Delhi remains concerned by China's close military ties with Pakistan and its growing footprints in the Indian Ocean, Central Asia and Africa.