This situation is more delicate. You need to express your gratitude to the applicants while explaining the principles of the team formation. Here are some ideas for your reference based on your company culture and event arrangements: 1. Publicly explain the positioning and theme of the event • In the event notice or related instructions, explain in advance that the performance team is built with an "all-female" image. The reason can be the theme of the event, the setting of the performance content (for example, showing the charm of women, the power of women, etc.) or the original creative concept. In this way, everyone will have expectations before signing up, reducing the embarrassment of temporary rejection. 2. Pay attention to the following points when communicating individually • Express gratitude: First, thank the male colleague for his attention to the event and his enthusiasm for signing up, so that he feels that his enthusiasm is recognized. • Explain the needs of the event: Explain that the performance team needs to show a specific theme or image (such as "the beauty of women" or "women's stories"), so it has to be set to all women, and this is also to ensure the consistency of the event theme. • Gentle denial: You can say: "Thank you very much for your enthusiastic registration and participation in our event. However, considering the theme and requirements of this performance, we finally decided on an all-female team lineup. I hope you can understand, and you are welcome to show your talents in other links or make suggestions for the event." • Provide other channels: If possible, you can suggest that male colleagues participate in other projects that are suitable for them to ensure that they are not completely excluded, which can also make him feel respected and fair. 3. Pay attention to wording and legal compliance • When expressing, avoid using stereotypes that may cause gender discrimination controversy, but instead highlight the creative direction and theme of this event. • If applicable, refer to the company's internal diversity and inclusion policy to explain that this arrangement is based on event planning creativity rather than an evaluation of personal ability or gender, so as to reduce possible misunderstandings and disputes. In general, you can reply to your male colleague like this: "Thank you very much for your enthusiastic participation and registration for this year's event! This time, our performance project has specially set the theme of 'all-female', aiming to show the unique style of women, so we have to form a team according to this creative direction. We are sorry that we can't include you in the main performance team this time, but we very much welcome you to participate in other links and contribute your talents and creativity. I hope you can understand and thank you for your support! " This not only fully affirms the other party's enthusiasm, but also clearly explains the basis and limitations of team formation, while providing the other party with other ways to participate, which helps to maintain a harmonious atmosphere in the team.