This document discusses the history and operations of two Chinese medical halls: Cheng Woh Medical Hall and Keen Hing Medical Hall. It provides background on traditional Chinese medicine and its founder Shen Nung. Both medical halls were established in the mid-20th century and are now run by subsequent generations. The document compares their products, locations, workers, target markets, and strategies for competing with other local halls. It analyzes similarities and differences between the two businesses and provides recommendations for improvements.