This is because you set it to be a large screen. You can shrink it by clicking on the upper right corner. (DingTalk) is a free communication and collaboration multi-terminal platform created by Alibaba Group specifically for Chinese enterprises. It provides PC version, Web version, Mac version and mobile version, and supports file transfer between mobile phones and computers. DingTalk was born for Chinese enterprises and helps Chinese enterprises improve the communication and collaboration efficiency of Chinese enterprises in all aspects through systematic solutions (micro applications).