1. Nature of key universities: Universities supported by key projects have different meanings in different periods.

2. Nature of ordinary colleges and universities: Full-time ordinary colleges and universities refer to schools that have at least reached the requirements of training junior college students and are eligible to recruit full-time junior college students.

Second, the overview of the two is different:

1. Overview of key universities: In the modern sense, key universities include those selected for national projects such as "Double First-class", "201Plan" and the basic capacity building project of universities in the central and western regions, as well as former national key universities, universities directly under the central government, universities established by provincial departments and provincial key universities determined by the governments of provinces, municipalities and autonomous regions.

2. Overview of ordinary colleges and universities: Ordinary colleges and universities referred to as "ordinary colleges and universities" refer to schools that implement higher education under the supervision of the Ministry of Education or provincial (including autonomous regions and municipalities directly under the Central Government) education administrative departments.

Third, these two categories are different:

1. Key university category: public schools.

2. Types of ordinary universities: including public schools and private schools.

Baidu encyclopedia-key university

Baidu encyclopedia-national key university

Baidu encyclopedia-ordinary colleges and universities

Baidu encyclopedia-full-time colleges and universities