Based on the difference in volume, momentum and surface texture, Ma Yuan 马远 (1190 – 1230) categorized water into 12 types and created a series of painting titled Water Album 水图. When I first arrived in Chicago — a city mapped by water, I searched for the 12 types along Chicago River. Chicago River originally flew from the west to the east. In the late 1800s, in order to prevent the pollution from expanding into Michigan Lake, the government decided to reverse the river’s course. It now flows from the east to the west.