Instead of India taking USA or any other country's help, India should learn to stand up on its own tow feet and learn to fight its own battles.
Spending at least 5% GDP on defence, taking arms purchase out of hands of politicians and Bureaucrats(who are only interested in commissions and lining their own pockets in arms deals, also Bureaucracy i.e. Babugiri means arms deals take years to finalise)and the task of arms purchases should be entrusted on Combined Defence Force team compromising of ex-army officers, arms deals should be transparent and concluded max. within 6 months to 1 year, there should be clear cut long term defence planning and our defence planning should be China rather than Pakistan centric.
Vietnam won the war against China and they did not take or need USA help to do so...India is a big country and with proper planning can easily take on China.
p.s. People will be shocked to know that Indian left parties took side of China instead of India during 1962 war. These traitors are now coalition partners of Congress in Centre.