Ba Shusong, chief China economist of Hong Kong Exchanges and Clearing Limited and chief economist of China Banking Association, speaks at the session of "Financial Risks: Black Swan, Grey Rhino & the Minsky Moment" during the Boao Forum for Asia Annual Conference 2018 in Boao, south China's Hainan Province, April 10, 2018. (Xinhua/Guo Cheng)