Chinese leader Xi Jinping departed Moscow on Wednesday having flattered his "dear friend" Vladimir Putin with a high-profile state visit at an otherwise delicate moment for Russia's president, whose campaign to make Kyiv bend the knee has run far over schedule. Putin is now the first leader of a permanent member of the U.N. Security Council with an arrest warrant to his name for possible war crimes. For his troubles, his Chinese opposite number was received with a red carpet, brass brand, big flags, and small tables. Xi's strides into the Kremlin were effortless; China's third-term president is comfortable with…