What's the difference between those sales positions that require bachelor degree or above and those that require junior college degree on the recruitment website?

First of all, you have to understand that everyone can do sales, but it is difficult to do it well. Bill Gates can become the richest man in the world, not because he invented Windows, but because he sold the system developed by others.

Therefore, it is normal for each employer to have different needs for the same sales position. You have to understand that every boss's employment standards are different. Radish and cabbage have their own strengths. Some employers' understanding of sales is to recruit a large number of people, so there is no restriction on academic qualifications. The more the better. Some employers may feel that the products they sell need better understanding and learning and training, so they require higher education. Another possibility is that employers don't need too many salespeople. In order to reduce the workload of the interview, it is normal to deliberately show the degree certificate to job seekers.

Also, since you majored in food science, I suggest that even if you switch to sales, it is better to choose related industries. For example, sales of nutrition and health products, sales of organic vegetables and coarse grains, and catering sales. This will give you an advantage when looking for a job, and you will have a better chance to use your professional knowledge in the future. After all, you also said that your school is not bad, so don't waste resources.