Participants of an education program interact with LIKU, a robotic teaching facilitator, at a senior citizen welfare center in Yangcheon District of Seoul, South Korea, Nov. 16, 2020. The Seoul Metropolitan Government is working with the Seoul Digital Foundation to promote digital education for senior citizens in Seoul, which is also part of the Robot Promotion and Supply Initiative of South Korea's Ministry of Trade, Industry and Energy. (Xinhua/Wang Jingqiang)