Yes nuclear torpedos are real and have been in service with USN and RN,US deployed Mark 45 and Russians are testing Status-6.
Not to cheer lead but you Bharatis have habit of making tall claims,which have often fell on your faces.
You do know that China is a highly industrialised state,they churn out ships and subs sometime at a rate which is astonishing even by US standards.
PLAN have ships which are equipped with area defence missiles,and we both know that their isn't any ship armed with such missiles in service IN.
While we discuss China vs Bharat one must note that by every passing day in every sphere PRC is going on route where China vs Bharat is over kill,balance is too much tilting in favour of PRC.