There are several places to pay attention to:
First, if you consult the human resources department by telephone, you may not get a very specific and satisfactory answer about the specific work content of the post. The human resources department may tell you some job contents mentioned in the job description, which you may get from the recruitment information.
Second, before the interview, the salary may not get the official specific answer, but will get a wider range, so even if you get the information, there are still great risks.
Therefore, the ideal situation is to have familiar people in the other company and find acquaintances to learn more specific and true information.