Does India have nuclear warheads, such a big threat to China

India has nuclear weapons, but India's nuclear weapons have limited deterrent power.

It is important to note that India and Pakistan are not recognized by the United Nations as nuclear-armed states, and India has refused to join the Nuclear Non-Proliferation Convention because the convention refuses to include it as a nuclear-armed state.

So while on from the military India has tested nuclear weapons, India does not possess intercontinental missiles, only medium range missiles. And it has problems with its missile technology as well as the localization process of its nuclear submarine technology. So although India has nuclear weapons and has the ability to use medium-range missiles to strike China. But the nuclear deterrence between China and India is not equal. China's nuclear deterrence against India is much greater than India's nuclear deterrence against China.