I think it's ok to change jobs four times in seven years, not a lot. Maybe the other company will think it is too much. Too frequent job-hopping will really affect your application to other companies. I suggest that you don't omit your work experience, because the labor manual is stamped by every company. If you hide it, you may be considered dishonest, or even if you are hired, you may be fired.

The more vague the questions about salary in your resume, the better. Generally speaking, I write negotiable directly, because I have clear requirements for the position, so I have always used this "professional card payment" method.

Secondly, some enterprises really value the number of job-hopping, and they care about employees' loyalty to the enterprise, which is normal. And some companies are also very sensitive to the interviewer's salary requirements.

Suggestions don't need to write everything clearly on your resume. The reason for leaving can be vague or not written at all. Work experience is there, and the company understands the post salary standard. (End)