成康之治
chéng​kāng​zhī​zhì

Rule of Cheng and Kang

成康之治 chéng​kāng​zhī​zhì
Rule of Cheng and Kang
The golden age of the Western Zhou dynasty during the reigns of King Cheng and King Kang, a period of peace and prosperity characterized by social harmony and the lack of need for criminal punishment for over forty years.