This is the certificate of my volunteer service for Christmas Cantata, a free drama performance in Washington D.C. In this experience, my partners and I delivered free tickets of performance door to door in Washington D.C., as well as assisting in organizing the performance. Although the work was laborious and exhausting, I felt unparalleled proud when I saw the toughed expression and happy smile of the audiences. Thus, I think this volunteer experience is one of my biggest success.