How many volumes is the "China Patent Index" divided into? How many volumes is the "China Patent Bulletin" divided into? Give me an accurate answer

"China Patent Index" is divided into three volumes:

1. Classification number index

2. Applicant and patentee index

3. Index of application number and patent number (after 1997)

"China Patent Bulletin" is divided into three volumes:

1. Invention Patent Bulletin

2. Utility Model Patent Bulletin

3. Design Patent Bulletin