Can China guard against a nuclear attack?

Theoretically, no country, including China, can guard against the attack of nuclear weapons, especially against the nuclear powers.

But in fact, because of the terrible nature of nuclear weapons, when a country possesses nuclear weapons, other nuclear-armed countries must consider China's nuclear retaliation before using nuclear weapons to attack, which it cannot prevent. Therefore, mutual scruples reduce the possibility of nuclear war. Developing nuclear weapons and ensuring nuclear deterrence are the main countermeasures for China to prevent nuclear attacks.

China's nuclear policy is: no first use of nuclear weapons and no use of nuclear weapons against countries that do not have nuclear weapons. Therefore, China's current method to prevent nuclear attack is to develop the most advanced missile interception technology and system, and develop the viability of nuclear weapons and the ability of secondary nuclear counterattack. Let the hostile forces trying to use nuclear weapons know the terrible consequences of nuclear counterattack.

Nuclear weapon refers to a weapon that uses the huge energy released instantly by self-sustaining nuclear fission or fusion reaction to produce explosive effect and has a large-scale destructive effect. It mainly includes fission weapons (first generation nuclear weapons, usually called atomic bombs) and fusion weapons (also called hydrogen bombs, which are divided into two levels and three levels).