DAY’s dAi Yi, currently a graduate student majoring in Software Engineering at MUST, Macau, China; the moderator of the Open-Source Software board at the official forum of CORE (China Open Resource for Education); meanwhile a yeeyaner at Yeeyan and an answerer at BaiduZhidao; does many things for fun, such as reading, translating, handwriting, programming; also enjoys playing Taiji.