Chinese electric car maker BYD’s doubled its profits to $1.3 billion in the first quarter as it continues to surge past its key rival, Elon Musk’s Tesla.The Shenzhen-based firm — whose annual revenue leapfrogged past Tesla’s last month to surpass the$100 billion mark — said quarterly revenue rose 36% to 170.36 billion yuan, or about $23.51 billion, for China’s top-selling car brand.By comparison, Tesla — which has struggled from tougher competition in China, an aging vehicle lineup and public backlash from ...