Dr. Zhang Ruihan, CTO of Siphone Science and Technology Ltd. Research Associate in City University of Hong Kong, worked as Research Scientist in Worcester Polytechnic Institute from 2019 to 2021, obtained PhD in ME from HKUST at 2019. He focused on high energy density battery and management system for eVTOL, fully automated battery electrode manufacturing process and green recycling of spent batteries. He has undertaken two TSSSU projects from HK ITC Angel Fund, participated in five projects of the US Department of Energy and the Hong Kong Innovation and Technology, published more than 40 academic papers, cited more than 2,100 times.