Well, yes, if it is a middle or senior management position or an important position, you will generally do some background checks to verify whether the information you provide is true and effective. Ordinary work, unclassified, basically no investigation, limited manpower and material resources. The easiest way is to ask your immediate superior about your work according to the work record you provided and the contact number of your previous company. The second is to search online whether the information about your former company is as you said. Then it may be to search for the authenticity of some information, success stories and so on you provide. The results of the survey are generally known only to the human resources department and your future superiors, and others will not know.