Piya
The Piya (; "Increased [Er]ya") was a Chinese dictionary compiled by Song Dynasty scholar Lu Dian (, 1042-1102). He wrote this "Erya" supplement along with his "Erya Xinyi" (爾雅新義 "New Exegesis of the "Erya"") commentary. Although the "Piya" preface written by his son Lu Zai (陸宰/陆宰) is dated 1125, the dictionary was written earlier; estimates around the Yuanfeng era (元豐, 1078–1085), and Joseph Needham says around 1096. Lu Dian arranged the "Piya" into 8 semantically based chapters that closely correspond with the last "Erya" chapters 13-19. The only exceptions are Chapter 5 ("Explaining Horses") that is contained in  Erya 19 ("Explaining Domestic Animals") and Chapter 8 ("Explaining Heaven") that anomalously corresponds with the first part of the "Erya". The preface explains Lu's motives for defining flora and fauna terminology. Since Song officials changed the basis for the Imperial examination from mastering poetry to "jingyi" (經義/经义 "expounding on a classical quotation"), literati no longer studied the lyrical names for plants and animals.