China has doubled down on its hard line against any nuclear escalation in Ukraine and called for restraint as Russia claimed that Britain and France were planning to give Kyiv nukes. Asked about Moscow’s accusation towards the two European nations, Chinese foreign ministry spokeswoman Mao Ning urged all sides to avoid actions that could cause misunderstandings or escalate tensions. “We call on relevant parties to remain calm, exercise restraint and avoid any moves that may lead to...