Formal intermediary company. It depends on whether the company has business qualification certificate, perfect training system and management system, perfect customer service (whether the signed service agreement is perfect and whether the legal protection for customers is reasonable). ). Choosing Yue Yue (nanny) mainly depends on whether she has a professional qualification certificate issued by the labor department (divided into three levels: primary, intermediate, advanced certificate or top ten certificate) and whether Yue Yue's file is true and complete (including ID card, health certificate, work experience, photos, etc.). ).