Paragraph 13 (d) of the ceasefire agreement requires that neither side introduce new weapons into Korea, with the exception of piece-by-piece replacement of equipment.  In September 1956, Joint Chiefs of Staff President Admiral Radford declared that the intention of the U.S. military was to introduce nuclear weapons into Korea, which was agreed upon by the United Nations National Security Council and President Eisenhower.  The United States unilaterally repealed Article 13 (d) and broke the ceasefire agreement, despite concerns from United Nations allies.    At a meeting of the Military Ceasefire Commission on 21 June 1957, the United States informed North Korean officials that the United Nations command was no longer bound by Article 13 (d) of the ceasefire.   In January 1958, Honest John missiles and 280 mm nuclear guns were deployed in South Korea followed by atomic demolition munitions and nuclear-armed matador cruise missiles, within reach of China and the Soviet Union.  North Korea believed that the United States had already introduced new weapons, referring to reports by the NNSC inspection team from August 1953 to April 1954   The United States believed that North Korea had introduced new weapons against 13 (d) but did not make concrete accusations.  Both sides regularly accuse the other side of violating the agreement, but accusations have become increasingly frequent due to increased tensions over North Korea`s nuclear program. The CCP Central Committee instructs Chinese representatives at the United Nations on how to respond to the confrontation on the Korean issue.
Chinese officials must express their willingness to end military action and express a desire to know the positions of the United Nations and the United States on the conditions for a ceasefire. In mid-December 1950, the United States discussed the terms of an agreement to end the Korean War.  The desired agreement would put an end to the fighting, provide assurances against its resumption and protect the future security of UNC forces.  The United States has requested the formation of a jointly agreed military ceasefire commission to oversee all agreements.  Both sides must agree to “stop the introduction of air, land or naval units or personnel in Korea… and not to increase the war equipment and equipment available in Korea.  The United States wanted to create a demilitarized zone about 32 km wide.  The proposed agreement would also address the issue of prisoners of war, which the United States believed should be exchanged one for one.
 Telegram from Mao to Stalin, which confirms that the PLA will put into practice the reorganizations proposed by Stalin. Mao also talks about several reflections on the U.S. proposal for ceasefire negotiations. On 28 April 1994, North Korea announced that it would cease to participate in the Military Ceasefire Commission, but would maintain its contacts in Panmunjom through liaison officers and maintain the general conditions of the ceasefire.