Three months later. Official website of Tianjin University shows that the doctoral thesis can be found in China HowNet three months after its publication. China HowNet, founded in June 1999, is an academic platform of Tongfang shares controlled by China National Nuclear Corporation Capital Holdings Co., Ltd. HowNet is the concept of National Knowledge Infrastructure (NKI), which was put forward by the World Bank in June 1998. CNKI project is an information construction project aimed at realizing the dissemination, enjoyment and value-added utilization of knowledge resources in the whole society.