The CTK group had a farewell dinner for Kang and Du. They both received engraved Jefferson's Cups from Prof. Zhou as gifts. Kang will become an associate professor in the department of materials science and engineering at Shanghai Jiao Tong University. Du will take a short break and find a job in Shanghai. Thank you for your great contributions in the past 5 years, Kang and Du! We wish you all the best for your new life in Shanghai.