Illegal. One-to-one is an online education brand that provides customized learning guidance. One-on-one person in charge said that it is illegal to transfer courses, which is an illegal act of copyright infringement. One-to-one owners were jointly founded by elites from Tsinghua, Peking University, Zhejiang University, Jiaotong University and Fudan University, and received investment from Songqing Capital, Shunwei Capital, Chen Da Venture Capital, Huasheng Capital and Huaping. Adopt a four-level ladder-like online education model for all subjects, and independently develop online education covering computers, tablets and mobile phones in primary and secondary schools.