Regarding a publication I have the Concise Catalogue of Modern Chinese Copper Coins, 2nd Edition. I find it hard to use but it does have good pictures.
Below is a description - you can find it a few places - I went through this excellent site and seller - https://coincoin.com/
"Concise Catalogue of Modern Chinese Copper Coins (2nd Ed.) This Western-friendly Chinese coppers catalog features excellent, slightly-enlarged photos and Woodward references for many varieties. The level of varieties distinguished is well beyond KM/SCWC but not quite as fine as Woodward, Duan, and various other Chinese works. Numerous enlarged detail panels help distinguish varieties, important given lack of clear descriptions and decent photos in the KM/SCWC. Unique numbering system, Renminbi valuations in five grades, Chinese text. Western auctions often references this work ("CL") and in working up a huge stock I found it, along with Woodward, to be the most practical reference for Western collectors. The larger-format 2018 2nd edition adds a few types with "a" numbers, many more detail insets, and completely revised pricing. A quick takeaway on the pricing changes since 2012 is the greater separation between grades (particularly in the EF-MS60 range), reflecting the maturing of the market. Hardcover, higher list price, and new difficulties importing Chinese books to the US contribute to the higher cost. 294p, 7.5x10", hc, 2018"
Below is a description - you can find it a few places - I went through this excellent site and seller - https://coincoin.com/
"Concise Catalogue of Modern Chinese Copper Coins (2nd Ed.) This Western-friendly Chinese coppers catalog features excellent, slightly-enlarged photos and Woodward references for many varieties. The level of varieties distinguished is well beyond KM/SCWC but not quite as fine as Woodward, Duan, and various other Chinese works. Numerous enlarged detail panels help distinguish varieties, important given lack of clear descriptions and decent photos in the KM/SCWC. Unique numbering system, Renminbi valuations in five grades, Chinese text. Western auctions often references this work ("CL") and in working up a huge stock I found it, along with Woodward, to be the most practical reference for Western collectors. The larger-format 2018 2nd edition adds a few types with "a" numbers, many more detail insets, and completely revised pricing. A quick takeaway on the pricing changes since 2012 is the greater separation between grades (particularly in the EF-MS60 range), reflecting the maturing of the market. Hardcover, higher list price, and new difficulties importing Chinese books to the US contribute to the higher cost. 294p, 7.5x10", hc, 2018"