Calvin is a passionate, innovative and widely respected digital marketing expert in China, with 20 years of experience in the marketing consultancy and advertising technology industry. Calvin currently serves as the CEO of China and a member of the global Leadership Team for VIOOH, a leading global premium digital out-of-home supply-side platform, in charge of the company’s business in the Greater China market. Prior to joining VIOOH, he was The Trade Desk’s first General Manager for China, where he contributed to the exponential business growth and talent development after its market entry. Before that, Calvin was the CEO at AdMaster & SVP of Mininglamp Technology and held management positions at The Nielsen Company in China and the US.
In 2018, Calvin was already recognised by Campaign as “40 under 40 APAC Leaders” and featured in “China’s Digital A-List”. He has also been actively engaged with industry organisations throughout the years, served as the 2020-2022 Co-Chair for MMA China, board member of China Advertising Association, Executive Chairman of the ECI@MarTech Committee, appointed as judge for prestigious industry awards. Calvin also regularly speaks at major international and domestic industry conferences to share his views and thought leadership regarding cutting-edge technologies & business models and sustainable development to advocate for marketing innovation in the digital economy.
Calvin graduated from the Hong Kong University of Science & Technology with a bachelor’s degree in Business (Marketing) and a master’s degree in Humanities. He enjoys reading, sports, education and community services, and travelling around the world with family. He is also a proud, life-long Manchester United fan!

Karen previously worked at the American Chamber of Commerce in Shanghai for 7 years starting in 2005, during which she formulated, implemented, and perfected business plans for expanding membership, services, sponsorship, advertising, and publications. She also managed all AmCham Shanghai member services and member engagement plans, including the formulation and implementation of new initiatives to better serve members and promote business development.
Before returning to AmCham Shanghai in 2019, Karen held leadership roles at the Worldwide ERC and The Conference Board, where she served as the Asia Pacific Managing Director and China Economics and Business Center leader, respectively. Her in-depth understanding of the Chamber of Commerce and her involvement in various fields make her a valuable asset to the organization, helping to make AmCham Shanghai more perfect and systematic in the fields of member management and business development.
Karen received her degree from The Hong Kong Polytechnic University.