In fact, the examination standard of national post certificate is the same all over the country, and this certificate is also common all over the country. For example, the fitness instructor qualification examination is actually a minimum standard for employment. The standard of this certificate is not high, but for zero-based fitness enthusiasts, it will be more difficult and the pass rate will be lower.
Personally, if you plan to be a fitness instructor for a long time in the future, you can go to a professional institution for training and systematic study, so that it will be easier for both textual research and work.