A system for marketing management, for launching new products / services, and for self-management is a hot topic under post covid-19. The new book of Dr. Shirley Yeung with co-authors from sport/ tourism industries and a world-wide NGO in Kenya on sustainable development provides insights to the readers that a strategy, a system, a network with social responsibility to present a new normal of thinking, doing and reflecting for self growth can be a business opportunity. I am pleased to recommend this book to the community that the system of sustainability is a new normal of thinking for us to pick up new things at a faster pace to suit unexpected challenges that come up anytime anywhere under this changing world. Mr. William ShumFounder/CEOMemorigin Watch Company Limited