China Non-Stamp Philatelic Sheets: Need Help Identifying

First time caller, long time listener here! By way of introduction: I'm a collector in his early 30s from Boston and focus primarily (for now) on worldwide pre-1940, pending identification of a narrower focus area...!

I came across these sheets in a dealer accumulation I picked up recently. Using my phone and Google Translate, I was able to uncover "China Philatelic" and something about an exhibition in Beijing, but can't really find anything else out about it. Any chance someone might be able to shed some light on them (or perhaps let me know if they're worth anything)?

Thanks in advance!

The Chinese government philatelic agency releases many pictorial souvenir sheets with no postal validity. They are generally not worth much, but are very beautiful artwork and fun to have. I have a few dating back to the 1980's. Not sure if any (or these) might be valuable, it's worth checking out on ebay, hipstamps and the rest.

CHINA ENTITY SOUVENIR SHEETS

Search this forum with the text string "entity souvenir"
(use the top search option)

https://goscf.com/t/59071&whichpage=3#691467 br /

Further Reading
https://goscf.com/t/77942 br /

Ornithology.
Bird Sheets 147 in Total Known.
Cat #0125

Cat #0686

Rod - wow, this is exactly what I was looking for. Thank you for the swift help!