After the successful meetings held in Beijing (2015) and Tokyo (2017), the 3rd Asian Electrochemical Impedance Spectroscopy (3rd-AEIS) Symposium will be held in Changsha, Nov. 15-17, 2019. The 3rd-AEIS symposium gathers experts of different fields around EIS, a powerful electrochemical tool, to open-heartedly share progress in developing EIS and experience as well as difficulties in applying EIS in many scenarios. It provides a wonderful opportunity for experts to reminisce about the centenary-long history of EIS, to reflect the ups and downs of EIS, and to present the prospect of EIS. This symposium consists of a tutorial session, oral and poster presentations including several plenary and keynote talks, and a problem-targeted Q&A session. Originated from a decades-long collaboration between a Chinese professor Jianbo Zhang and a Japanese professor Masayuki Itagaki, the AEIS symposium series has evolved into a scientific event with a unique vision: friendship through EIS. Welcome to 3rd-AEIS!