A visitor uses his mobile phone while passing by the stand of Huawei during an industry expo in Beijing. Huawei Technologies Co's HarmonyOS has become the "most vibrant" ecosystem, with the number of devices that have installed the company's self-developed operating system exceeding 320 million, representing a 113 percent year-on-year increase, Yu Chengdong, CEO of Huawei's consumer business group, said …
