Job seeker's past work information: on-the-job time, on-the-job position, salary range, work content, interpersonal relationship, specific reasons for leaving the job, and business ability level, including personal basic resume: verification of academic information, authenticity inquiry of certificates in various subjects, authenticity inquiry of personal identity information, inquiry of basic social and financial relations, inquiry of criminal records, etc.

Back tone is to investigate and verify the background information provided by the applicant and the work experience mentioned in the interview.