你是某国际学校学生会主席，要为一项活动写英文通知。

To build up mutual trust among students in the new classes, the Students’ Union is going to organise an Outward Bound activity for Senior One students, with the theme “We are a family”. It will be held in Yuexiu Park from 9:30 am to 4:00 pm next Sunday. It will feature/include a variety of activities, such as relay races and rescue games. Participants should wear sport clothes and bring their own lunch and water. Those who need to ask for leave should send an email to studentsunion@163.com before January 20 ^th .