Figure 1 (IMAGE) Higher Education Press Caption Figure 1 Credit Haixing ZHANG, Yuan FENG, Yanxiang JIA , Pengqi LIU , Yong HOU, Jianbo SHEN, Qichao ZHU, Fusuo ZHANG Usage Restrictions none License Original 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.