Constantly expanding its product lines and production capacity, Primax expanded from a single Dongguan plant with 25 workers in 1989 to its current nine factories and 4,000-plus workforce. Primax's performance, H.D. Yeh notes, pushed its mother company in Taiwan to go public seven years ago. Primax is one of the few Taiwan electronics companies with a definite "China orientation."
葉宏燈指出，東莞東聚電業配合台灣母公司「台灣致伸實業」的發展，扮演生產基地的角色，七年前「台灣致伸」成為股票上市公司，是電子股中少見的「中國概念股」。