It is legal for hummingbirds to fly. Hummingbird Yu Fei has a formal business license and tax registration certificate, and pays taxes according to law. Founded on 20 17-06-29, the full name of the company: Beijing Hummingbird Yufei Technology Co., Ltd., focusing on the research and development of 2D and 3D casual games in overseas markets, and the company's address is Block A, Yinhe SOHOA, Dongcheng District, Beijing.