This is Professor Qingyang Liu's Collection of Essays. Liu graduated from the History Department of North West University at 1951, and then he worked as a history teacher and researcher in the same college near 40 years. Liu's main works include Historical Records of the Ban Family, Zhang Xuecheng talks on Han Shu, The Development of the Ballads of the Ming-Qing Period, etc. In this book, his 17 essays on history of Ming-Qing period, two earlier memoirs and 6 poems are included.