Wang Jin beats Gao Qiu theme music from The Water Margin featuring a suona solo
. Source. 
Stringless guqin fan painting by Feng Chaoran (1943)
Stolen traight from www.silkqin.com/10ideo.htm on silkqin.com:Wind in the pines and a babbling brook are nature's melody. A qin was brought along, but there is no need to play it
Some free online collections:
** collections.si.edu/search/results.htm?q=&fq=online_visual_material%3Atrue&fq=online_media_type%3A%22Images%22&fq=culture%3A%22Chinese%22&fq=object_type%3A%22Paintings%22&view=list&date.slider=300s%2C1800s
Unclear legality:
- www.ibiblio.org/chinese-music/html/traditional.html has many tracks which appear to be rips from vinyl records due to the scratching sound, and unclear attribution
This classification is too restrictive, and too South-centered. But if is worth knowing.
The most important publisher, AKA "CRC Jianian". TODO meaning of Jianian?
Chinese government owned unfortunately.
Their website takes forever to load: www.china-crc.com.cn/, and features mostly Communist shit, and I can't find the decent traditional music listed there.
One thing to try is an Amazon advanced search by label "China Record Co": www.amazon.com/s?i=digital-music&rh=p_33%3AChina+Record+Co&s=relevancerank&Adv-Srch-MP3-Submit.x=42&Adv-Srch-MP3-Submit.y=4&unfiltered=1&ref=sr_adv_m_digital
There are unlisted articles, also show them or only show them.