An encyclopedia, each entry with whatever data I can find. For species synonyms, use the catalogue of life. Should improve searchability.

1972 36-String Pedal Zheng

Pedal zheng.png

Created in 1972 by Zhang Ziyue of the Suzhou Musical Instrument Factory of Jiangsu province, pedal actuated zhengs came onto the scene to solve the same problems as the earlier modulated zheng - and had some of the same limitations. 

This is a 36-string zheng made around that time, tuned in the western diatonic scale.

Image Source: Music Research Institute via Han 2013.

ZhengJ BModulated, PedalComment