In the sense of: what kinds of corporate forms existed (if any?), what financial instruments were commonly used and what kinds of markets did they trade in? I chose the time period to represent what I hope is prior to significant impositions by European powers.
Also: yes, I know China is very big and there was probably a lot of variation. I'm most interested in hearing about whichever areas had the most sophisticated financial markets, their "cutting edge".
A coulpe of pointers: Capitalism is a social phenomenon originated in Great Britain and maybe the Netherlands, that then propagated around the world via empire and industrialization. Therefore, thinking of "Capitalism" in China before any significant contact with the Europeans might be a misnomer.
The chinese certainly had financial instruments and they were also integrated with the world economy to a degree at that time (we have reports of chinese porcelain vases being sold to brazil, then a portuguese colony, at the 18th century, not to mention the trade in silver between the chinese and the spanish). That said, the presence of these factors does not constitutes Capitalism. To have that we would need to have a capitalist class that had its economic status linked to the value extracted from (industrial) production.
I think a rephrasing of the question might extract better answers, such as "Which financial instruments, corporations and markets existed in 17th century China?"