Hong KongCNN — 
As US President Joe Biden touched down in Ukraine to meet with his counterpart Volodymyr Zelensky on Monday, China’s top diplomat was traveling in the opposite direction, on his way to Russia.
Wang Yi – who was promoted as Chinese leader Xi Jinping’s top foreign policy adviser last month – is due to arrive in Moscow this week as part of his eight-day Europe tour, a trip that brings into focus China’s attempted diplomatic balancing act since Russia tanks rolled into Ukraine a year ago. 
The optics of the two trips – taking place just days before the one-year anniversary of the brutal war on Friday – underscores the sharpening of geopolitical fault lines between the world’s two superpowers.
While relations between the US and China continue to plummet – most recently due to the fallout from a suspected Chinese spy balloon that entered US airspace, China and Russia are as close as eversince their leaders declared a “no-limits” friendship a year ago – partly driven by their shared animosity toward the United States.
And as the US and its allies reaffirm their support for Ukraine and stepped up military aid, Beijing’s deepening partnership with Moscow has raised alarms in Western capitals – despite China’s public charm offensive in Europe to present itself as a negotiator of peace.