India needs a 5000-7000 range km missile as fast as possible. Only when the entire Chinese mainland including Beijing, Shanghai and the newly acquired Hong Kong can be threatened from any part of India by Indian nuclear capable missiles, can we have a reasonable deterrent against China. Also develop Submarine Launched Ballistic Missiles, so that any Chinese city can be targeted from the seas. At least 50 nuclear missiles form land and 50 nuclear missiles from water, including around 25 thermo nuclear warheads (hydrogen bombs), each from land and water are needed to be aimed at China for credible deterrence. The hydrogen bombs must be at least 100 kiloton TNT equivalent. Without this, credible deterrent cannot be achieved against China.
