Studying the Editions of Lu Xinyuan''''s Yigutang Ji
陆心源《仪顾堂集》的版本

The four editions of Yigutang Ji written by Lu Xinyuan: 8 volumes, 12 volumes, 16 volumes and 20 volumes edition, are different in such aspects as the written deadline of articles or the publishing time and place mentioned in each of them. These differences are the clues to finding out the different academic trends of Lu Xinyuan at different times of his life, and understanding how Lu Xinyuan, as a great book collector, were collecting books throughout his life.