In an international metropolis like Beijing, people's self-confidence often stems from their rich cultural heritage and open environment. This self-confidence is the embodiment of Beijingers' enthusiastic and straightforward character. In teamwork, self-confidence can be a positive force for innovation. In order to ensure team harmony, it is recommended to take the following measures： 1. **Establish clear team goals**: Ensure that each member is clear about the overall goals and personal responsibilities of the team, which helps to transform personal self-confidence into team motivation. 2. **Promote open communication**: Encourage frank communication between team members and establish a culture where everyone feels that their opinions are respected and valued. 3. **Diversified team building activities**: Enhance understanding and trust among members through team activities, and reduce misunderstandings caused by cultural differences. 4. **Provide a feedback mechanism**: Establish a fair feedback system so that team members can express their views and suggestions on the way of cooperation. 5. **Leadership guidance**: Leaders should lead by example and show how to combine self-confidence and humility to promote teamwork. Through these methods, personal self-confidence can be effectively transformed into team advantages, thereby improving the overall cooperation efficiency and innovation ability.