Elon Musk, the world's richest man and a top adviser to U.S. President Donald Trump, was issued a summons in connection with the Securities and Exchange Commission's lawsuit against him, a court filing on Thursday showed. A process server gave the civil summons and other documents on March 14 to a security guard at the Brownsville, Texas, headquarters of SpaceX, the space technology company of which Musk is CEO, the filing said. Chinese tech giant Huawei on Thursday unveiled the Huawei Pura X, the first smartphone that runs on its self-developed HarmonyOS 5 operating system. The HarmonyOS 5-driven Pura X features a 1:1 smart interactive outer screen, allowing high-frequency operations to be performed without unfolding the device, the company announced at the launch event in Shenzhen City in south China's Guangdong Province.