Data Science 7th International Conference of Pioneering Computer Scientists, Engineers and Educators, ICPCSEE 2021, Taiyuan, China, September 17–20, 2021, Proceedings, Part I - Zeng, Jianchao; Qin, Pinle; Jing, Weipeng; Song, Xianhua; Lu, Zeguang (Communications in Computer and Information Science, 2021)