the alphabetical order of contestants' names, the time of registration, the ranking of competition results, etc.

1. Alphabetic order of contestants' names: Sort from A to Z according to the initials of contestants' names (surnames).

2. Registration time sequence: according to the time sequence of submitting application forms or related materials when registering for mathematical modeling competition or training activities.

3. Ranking of competition results: If you win an award in a competition, the winners will be ranked according to different levels, such as competition suggestions, excellence award, first prize and second prize.