I took my CAAC ATPL written less than a month ago. It was quite a pain in the (cough) and I scored the lowest I ever did in a written aviation exam. First 75% are out the FAA ASA or Gleim ATPL databank, some 737 tech questions, some A320 loading questions (I guessed on those) and about 20% of almost illogical sounding Chinese-translated-into-poor-English questions. Some easy, some leave you completely flummoxed.
Taking the exam is quite an adventure. We were in an old 60s communist-style building, but there were no less than 4 cameras observing you during the entire exam-taking process.
PM me your email, if you want the ATPL databank. (I assume you're referring to mainland China and not HK which I believe has a different aviation authority/licensing).