On December 7, Dr. Bob Chen was invited to attend the International Ultrasound Musculoskeletal System Disease Treatment Symposium by the Hong Kong Pain Society.  Besides Dr. Chen, the Society also invited ten other international experts give talks.  As the only scholar from China, Dr. Chen talked about how to use high-intensity focused ultrasound to treat pain in the knee patella tendon.  The conference was extremely professional, and Dr. Chen sighed emotionally: “Technology advances so quickly!  After returning to China, I have had so much business to do, and so many classes to teach, but have done little high-level research.  I have learned and been inspired a lot.  We need to work harder!  Good is not good enough.”