FILE - A boy holds Russian and Chinese flags before a welcoming ceremony for Russian President Vladimir Putin at the Great Hall of the People in Beijing on June 25, 2016. Three weeks ago, on the eve of the Beijing Winter Olympics, the leaders of China and Russia declared that the friendship between their countries "has no limits." But that was before Russia's invasion of Ukraine, a gambit that will test just how far China is willing to go. (AP Photo/Mark Schiefelbein, File)