Macau Business. November 2021. By José Luís de Sales Marques. A symbiotic relationship is one that is characterized as a “close physical association between two or more dissimilar organisms”; it could also mean a “close, cooperative, or interdependent relationship” (Merriam- Webster). Macau and Hengqin couldn’t be more dissimilar, for Macau’s five centuries of urban history does leave a strong and distinctive mark on its landscape, way of life, and so many other plural features. See more