Confronted with  profound changes unseen in a century  partly as a result of the rapid advances in science and technology that present unique challenges and opportunities for China during  the course of its national rejuvenation, what should China do? What are the changes? How should China manage its relationship with the rest of the world ? Yu Hongjun, former ambassador of China to Uzbekistan and a senior expert on international relations, shared his views with the audience at the closed-door conference.