Along the hallway that connects the waiting area to the four treatment rooms at a Chinese medicine clinic in Manhattan’s Chinatown neighborhood, a five feet and a half Chinese old man stepped out. He held a horn-like stick and looked fatigued. "How are you," Doctor Yiqiao Wu greeted while calling Matz's name, a 60-year-old white woman who just visited Wu for the first time. Wu's clinic resides in a 5-story building near Canal St on the north side of Manhattan’s Chinatown neighborhoo...