Tsinghua of Peking University has many enrollment plans in Beijing, accounting for about 30%, much more than other provinces.
Therefore, in the Beijing College Entrance Examination, you may be admitted to Peking University Tsinghua if you rank 1000, while in other provinces with few enrollment plans, you can only be admitted to Peking University Tsinghua if you rank around 50 in the whole province, and there are no more candidates in Beijing, so its advantages are obvious.
Tsinghua University, referred to as "Tsinghua" for short, is a university directly under the Ministry of Education of People's Republic of China (PRC) and a unit directly under the central government, ranking as "2 1 1", "985 Project" and "World-class University and First-class Discipline".
Peking University, referred to as "Peking University" for short, is a national key university directly under the Ministry of Education of People's Republic of China (PRC), ranking among the "Double First Class", "21Project" and "985 Project".