Add did:china method

[LanceWzt]

As a DID method registrant, I have ensured that my DID method registration complies with the following statements:

• [x] The DID Method specification defines the DID Method Syntax.
• [x] The DID Method specification defines the Create, Read, Update, and Deactivate DID Method Operations.
• [x] The DID Method specification contains a Security Considerations section.
• [x] The DID Method specification contains a Privacy Considerations section.
• [x] The JSON file I am submitting has passed all automated validation tests below.
• [x] The JSON file contains a contactEmail address [OPTIONAL].
• [x] The JSON file contains a verifiableDataRegistry entry [OPTIONAL].

[mwherman2000]

The entire idea of a DID Method list/registry/glossary is going to become a moot point in 2025 when I move to "register" approximately 4.1 million DID Methods. Should I use one PR or two?

[brianorwhatever]

@mwherman2000 you should use 4.1 million PRs.

[brianorwhatever]

And you should have 4.1 million different specifications with implementations. If you're goal isn't just to waste people's time that is 🙂

[mwherman2000]

That's how ridiculous the current approach is.

[msporny]

Closing due to non-response to maintainer questions and feedback.