A self-portrait (自画像) was sold for over $688,888 in March, CNN reported. Its painter is neither Picasso nor Van Gogh. In fact, the painter is not even human. A robot called Sophia developed by Hong Kong-based firm Hanson Robotics created the work. Since its activation (启动) in 2016, Sophia has become well known worldwide for its realistic movements and complex (复杂的) facial expressions.