Elon Musk wants to dig tunnels. Without them, he says, “we will all be in traffic hell forever.” It’s a well-timed ambition, given President Trump’s plan to spend $1 trillion on infrastructure projects. Let’s hope he can figure out what he’s doing. Musk has already started burrowing near the offices of Space Exploration Technologies Corp. in Los Angeles — …

  Chinese companies looking to escape slower economic growth at home have turned, quite naturally, to soccer and Hollywood. They should prepare for some unhappy endings. Recon Group, the Chinese firm that bought the UK’s Aston Villa Football Club, is the latest to attempt to add movie making to its bow, in talks to acquire Millennium Films, according to people …

  Bloomberg Lenovo Group Ltd.’s mobile-phone business continues to shrink, while its personal-computer division managed anaemic growth in the face of brutal holiday-season competition. The world’s largest PC maker’s profit plummeted more than two thirds in the December quarter, missing analysts’ projections after HP Inc. threatened its position in North America. Smartphone sales declined almost a quarter globally as Lenovo …