I met Master Zhu and his family in 2000 through an introduction from his niece. She lived with her family in the U.S. where my family met them just prior to moving to Beijing. As a child, she had lived in this same Beijing apartment (across the street from Workers Gymnasium) and watched her grandfather teach Taiji privately. All she knew he was that her grandfather was famous and that her uncle practiced too.
After learning from Master Zhu, I eventually introduced others to him, including Howard Wang whose father, Wang Chieh, I had learned from in Taiwan in the late 80's. Thanks to Howard for filming. This clip was taken in probably mid-2002.