In 1976 Hsu retired from teaching and moved to Taipei, where he worked for six years in the T'ai Li Natural Color Developing Co. and was eventually promoted to the position of director of the technical service department.
民國六十五年，許安定自教職退休後，轉赴「台北」泰立天然彩色沖印公司做事，幹了六年，做到技術服務部主任。