e-Learning, e-Education, and Online Training 5th EAI International Conference, eLEOT 2019, Kunming, China, August 18-19, 2019, Proceedings - Sun, Guanglu; Sun, Guanglu; Gan, Jianhou; Gan, Jianhou; Liu, Shuai; Liu, Shuai; Lang, Fei; Lang, Fei; Lu, Zeguang; Lu, Zeguang (Springer International Publishing : Imprint: Springer, 2019)