Yilong Ma, Elon Musk’s viral Chinese doppelgänger, has been “training” for the world’s richest man’s unofficial fight against fellow tech billionaire Mark Zuckerberg — in case his look-alike struggles. What’s going on: Musk, 52, first declared on Twitter, now known as X, that he was “up for a cage match if he [Zuckerberg] is” on June 20. This happened after the news broke that Zuckerberg, 39, had been developing the social media platform’s rival, Threads.