US President Joe Biden meets with China's President Xi Jinping during a virtual summit on November 15, 2021 – Copyright AFP Charley PIRINGI A rare joint opinion article by the ambassadors of China and Russia has sharply assailed President Joe Biden’s plans for a virtual summit of democratic countries — from which they were pointedly excluded. Calling the US plan “an evident product of its Cold-War mentality,” ambassadors Anatoly Antonov of Russia and Qin Gang of China said the December 9-10 event would “stoke up ideological confrontation and a rift in the world, creating new ‘dividing lines.'” The summit is…