Chinese operators have recently started to blow 5G network again. A few weeks ago, China Mobile announced its 5G Call, a video call feature that works directly from the smartphone dialer. Also, recently, China Unicom also launched the 5G video account. All these technologies centre around the ability to make video calls directly through dial-up. Not only is it better than the voice and video functions on various social software, but incoming calls also can not interrupt the video call. The most convenient thing is that there is no need to download an app. So the question is, what exactly…