"All parties should remain calm and exercise restraint, and jointly promote de-escalation," Chinese Foreign Ministry spokesperson Mao Ning said.

Russia says it will make changes to the doctrine that sets out the circumstances in which it might use nuclear weapons. What might that mean? WHAT DOES RUSSIA'S EXISTING NUCLEAR DOCTRINE SAY? The current doctrine was set out by President Vladimir Putin in June 2020 in a six-page decree.

Russia intends to change its nuclear doctrine based on an analysis of the conflicts of recent years and the "escalation course" of the West. Source: Sergei Ryabkov, Russia's Deputy Foreign Minister, in a comment to TASS,

Russia will make changes to its nuclear doctrine in response to the West's actions over the conflict in Ukraine, the TASS state news agency cited Deputy Foreign Minister Sergei Ryabkov as saying on Sunday.

Russia will change its rules on the use of nuclear weapons in response to the Western escalation of the war in Ukraine.’ This was said by Sergei Ryabkov, deputy foreign minister, in Russian state media.