Because in 1898, during the Reform Movement of 1898, as a new policy, Shi Jing University Hall was established. Shi Jing University Hall is the highest institution established by the first country in modern China, and it is also the predecessor of Peking University today. Therefore, Shi Jing University Hall, founded in 1898, is not the predecessor of Tsinghua University.
Tsinghua University, Tsinghua for short, is a national key university directly under the Ministry of Education and the Central Government of People's Republic of China (PRC).