21 alumni majored in environmental engineering returned to their alma mater from all over the country to celebrate the tenth anniversary of graduation. Firstly, they visited the entire campus which changed a great deal. Then professor Ye introduced them the development of our college at the symposium. He hoped that every alumni could make prominent contributions to our country’s environmental protection career. Finally, the alumni denoted a landscape stone to the college and professor Ye and professor Deng attended the unveiling of the landscape stone.