Sentence:  [He wrote] "Textual Criticism of Kangxi Zidian", 1827[,] in which he identified more than 2500 erroneous citations in <WSD>Kangxi</WSD>. 
Meaning of the word marked with <WSD> tags:  The (Kangxi Dictionary), a dictionary and cross reference of Chinese characters, first published in 1716 at the behest of the (Kangxi emperor), and used to the present day.