On the topic of fiber optics and the internet, Yeh is particularly knowledgeable and incisive. Whenever Yeh goes to Japan he happily brings back lots of Japanese books about economics and technology, such as those about third-generation mobile phones, hand-held devices and so forth. "I study the concepts presented in these books, and then I use the viewpoint of a businessman to see if there would be any problems implementing them."
談起光纖、網路，老先生頭頭是道，每次去日本，葉進泰最高興的就是帶回各類有關新科技、新經濟的日文書，像第三代大哥大、掌上型視訊產品等，「看到書裡面的構想，就用生意人的眼光想想製造有沒有困難？