Xinhua Gu, graduated from Huazhong University of Science and Technology in 2011. Now I am glad to join in the group supervised by Dr Chun Tang as a post-graduate student. I am very active and like photographing, playing football, kerate and travelling. Initially, it was very challenging to start the studies on new research interest, but I was willing to take it as it was a good oppotunity to improve myself. In this group, there are modern research devices and friendly co-workers.