Certified tax accountant, certified accountant, registered auditor, internal auditor, acca and so on are more difficult to test. Of course, the gold content is also higher, among which certified public accountants are the most difficult, but they do not require working years, and they can participate just after graduation. Certified tax agents must have corresponding years, which is not enough to fail the exam.
That's how I passed the exam. Accountant junior (passed)-intermediate (passed)-certified public accountant (passed)-certified tax agent (just finished the exam this year).
I also majored in auditing. The reason why I didn't take the audit is that accountants are more general, and auditors are organized by the Audit Office. I don't feel so fair to people outside the system, especially the combination of advanced evaluation.