Signing Ceremony (IMAGE) The Hong Kong Polytechnic University Caption The agreements are signed by Ir Professor Alex WAI (middle, front row), Mr Sean ZHANG (left, front row), and Mr YAN Jianguo (right, front row). Credit The Hong Kong Polytechnic University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.