The so-called "unified recruitment" refers to enrolling students within the national plan. You must pass the college entrance examination and have certain requirements for scores. It is a formal education, and you can get a degree smoothly. The state also has corresponding software and hardware regulations for schools to ensure the teaching quality of students. The diploma after graduation naturally does not have the word "adult".
adult education
As for adult education, you can study without the college entrance examination, or you can study while working. As long as you pass the corresponding exams, you can graduate, and the diploma will be marked "adult". If you want to get a degree, you must pass a special national exam, such as the English exam for a bachelor's degree.
suggestion
If you are a college entrance examination student this year, it is recommended to go to a regular undergraduate or junior college if possible. Don't trust the propaganda of the admissions staff easily.