Double degree, broadly speaking, refers to the second bachelor's degree, which is a "double degree" project in cooperation with overseas universities, with a minor in major (minor in second degree). In the usual context of our country, it only refers to the secondary degree. It means having two degrees of the same level. Strictly speaking, it refers to one undergraduate degree and two ordinary full-time undergraduate degrees.
The minor double degree refers to the bachelor's degree recognized by the state and the bachelor's degree independently issued by the school. A minor is shorter than a double degree, usually two years. The double degree is two and a half years, so the credits are less than the double degree, and the corresponding tuition is also less.
If you minor, you don't have to take elective courses. The pressure is not as great as a double degree. Usually only 2-3 courses are taken in one semester, and there is no need to choose elective courses for double degrees. However, every semester is 4-6 courses, which takes up a lot of weekend time. Those who need to study have better energy to cope with the dual-major courses.
After graduating from a double degree, a double degree certificate will be issued, while the minor only has a certificate of completion, which has no competitive advantage.