-Analysis-

PARIS — Since Xi Jinping and Vladimir Putin said last year that the friendship between their nations was "boundless," the world has wondered where the limits really lie. The Chinese president's three-day visit to Russia, which began Monday, gives us an opportunity to assess.

Xi's visit is important in many ways, particularly because the International Criminal Court has just issued an arrest warrant against Putin for his role in forcibly sending thousands of Ukrainian children to Russia. For Putin, there could be no better response to this international court, which he does not recognize, than to appear alongside the president of a great country, which, like Russia, is also a permanent member of the UN Security Council. How isolated can Putin really be, when the leader of 1.5 billion people in China comes to visit?