A man takes pictures with a space suit at the 2019 Mobile World Congress (MWC) in Barcelona, Spain, Feb. 28, 2019. The four-day MWC d on Thursday. (Xinhua/Guo Qiuda)

People visit the booth of telecom operator Orange at the 2019 Mobile World Congress (MWC) in Barcelona, Spain, Feb. 28, 2019. The four-day MWC d on Thursday. (Xinhua/Guo Qiuda)

People visit the booth of Chinese tech company Xiaomi at the 2019 Mobile World Congress (MWC) in Barcelona, Spain, Feb. 28, 2019. The four-day MWC d on Thursday. (Xinhua/Guo Qiuda)

A woman poses for photos at the 2019 Mobile World Congress (MWC) in Barcelona, Spain, Feb. 28, 2019. The four-day MWC d on Thursday. (Xinhua/Guo Qiuda)

A man plays a VR game of HUAWEI at the 2019 Mobile World Congress (MWC) in Barcelona, Spain, Feb. 28, 2019. The four-day MWC d on Thursday. (Xinhua/Guo Qiuda)

People visit the booth of Chinese tech company Huawei at the 2019 Mobile World Congress (MWC) in Barcelona, Spain, Feb. 28, 2019. The four-day MWC d on Thursday. (Xinhua/Guo Qiuda)