In 1962 Dr. Chao retired from the military to open his hospital. In 1965, he wrote every night for three hours, and gave his work to five old friends and their wives for reviewing and correcting.
民國五十一年，紀剛自軍醫院退休自行開業；五十四年醫院漸上軌道，他開始每晚九點準時上三樓直寫到十二點。