Photo taken on Feb. 26, 2018 shows a screen displaying the 5G technology at the booth of China's telecom giant Huawei during the 2018 Mobile World Congress (MWC) in Barcelona, Spain. (Xinhua/Guo Qiuda)

　　SHENZHEN, May 25 (Xinhua) -- Chinese telecom giant Huawei will officially launch its new operating system HarmonyOS for smartphones on June 2, the company said Tuesday.

　　HarmonyOS, or Hongmeng in Chinese, is an operating system designed for various devices and scenarios. It was first launched on Internet-of-Things devices.

　　Huawei expects the number of devices equipped with HarmonyOS to reach 300 million by the end of 2021, including more than 200 million for Huawei devices.