What period of time has the guqin been prevalent

The guqin, also known as the yaoqin, jade qin, seven-stringed qin, is one of China's oldest plucked musical instruments, the guqin was prevalent in the period of Confucius, with a written history of more than 4,000 years, and according to the "Records of the Grand Historian", the qin appeared no later than the period of Yao and Shun. At the beginning of this century, the word "gu" was added in front of "qin" to distinguish it from Western instruments, and it was called "guqin". It is an ancient musical instrument that is still played in the study halls and on the stage.