As he grew older, Chang wished to dispose of certain pieces that he had collected in the early years, and this impulse led him down his destined path as an art dealer. He remembers, "If there was a piece that I didn't really like, I would be willing to part with it even at a slight loss. I treated such losses as the price I paid for learning the business."
隨著年齡漸長，張允中早年收藏的古董文物中，較不滿意的就想脫手，也開啟他買賣古董文物的因緣：「既然是不合自己品味的文物，所以價錢上寧願吃虧一點以求脫手，就當作是繳學費吧。」