They are buxiban. It’s a cultural concept that can’t be properly translated, like guanxi, yinyang, or meiyou.
In all seriousness, they are neither juridical persons nor entities with no capacity. They are business entities, but they are (according to the BLI) not “businesses” or “firms”. So you can see, it’s not completely straightforward.
Don’t hire a translator to do a whole 30 page document until you know what the document is. If it’s the Supplementary Education Act, it’s already available online in English. (Unless you’re hiring me! 
)
Possibly of interest: