"... On the level of Western theory of music, the most important introduction was Lülü zuanyao 律呂纂要 (Compilation of Musical theory) written by Tomé Pereira on behalf of the Kangxi emperor, and completed after Pereira’s death by Pedrini.* The work was revised and partly integrated as the last part of the Lülü zhengyi xubian 律呂正義續編, the supplement to the imperial encyclopedia on music Lülü zhengyi 律呂正義 (part of Lülü yuanyuan 律呂淵源, 1723).** It features a presentation of the tonal system, rhythmic and staff notation and is a good example of the difficulties involved in translating musical terminology from a European into a Chinese tradition."

*mss discovered by Wu Xiangxiang 吳相湘, who first published his discovery in Guangzhou daguang bao 廣州大光報 (7 November 1936)…”
**"Also included in Siku quanshu 四庫全書...."

Collection: Siku quanshu huiyao 四庫全書薈要.
Editions online Internet Archive.
Edition with text, image, and dictionary tools at ctext.org
Local access dig.pdf. [Pereira-Lulu zhengyi xubian.pdf]