BEIJING, Feb 24 (Reuters) - China called for a comprehensive ceasefire in Ukraine on Friday and President Volodymyr Zelenskiy said he was open to considering parts of a 12-point peace plan put forward by Beijing. On the first anniversary of Russia's invasion of Ukraine, Moscow's ally China urged both sides to agree to a gradual de-escalation, warned against the use of nuclear weapons and said conflict benefited no one. See here for a complete list of exchanges and delays