There is no difference between one book and two books. According to China Education Network, Nanjing Open University was originally the Central Radio and TV University, or RTVU for short, and it is a nationally recognized academic qualification. With electronic registration, academic information can be found on Xuexin.com, no matter one or two. Nanjing Open University adheres to the school-running philosophy of "everyone can learn, learn at any time and learn everywhere" for all citizens in Nanjing. Its function is to build a lifelong education system and build a learning society.