In the midsummer of 2021, more than 1000 outstanding young people from 96 countries and regions and 151 world-renowned universities attended Tsinghua GSS2021. In 2021, Tsinghua University's global summer school deeply practiced the concept of sustainable development and started a wonderful and fulfilling journey. The opening performance was specially added to the opening ceremony of the summer school. The performance content was composed of wonderful video clips such as Gala night, the International Cultural Festival, the 110th Anniversary Gala and the Global University Presidents’ Forum of Tsinghua University. It fully demonstrates the International Campus Image of Tsinghua University, which is open, inclusive, friendly and diverse.