1. age group: the contestants are divided into groups according to their age, such as primary school group, junior high school group and senior high school group. Players of different ages will have differences in technical level and understanding ability, so grouping according to age can provide a level playing field.

2. Experience level group: The contestants are divided into junior group, intermediate group and advanced group according to their experience and technical level. This will allow players with similar skills to compete with each other and promote each other's progress and learning.

3. Aircraft model group: grouped according to different aircraft models, such as remote-controlled sailboat group, remote-controlled speedboat group and remote-controlled submarine group. Each type of aircraft has its specific technical requirements and operation methods. Grouping the contestants according to different types can better show their expertise and skills.

4. Task difficulty group: Group according to the difficulty of competition tasks, such as primary task group, intermediate task group and advanced task group. Different difficult tasks put forward different requirements for players' control ability and problem-solving ability. Proper grouping can ensure fair competition and appropriate challenges. These grouping methods can be adjusted and combined according to the scale and requirements of specific competitions. It is important to ensure that the grouping is reasonable and appropriate, which can provide opportunities for fair competition and promote mutual learning and communication between players.