Is Renren part-time job a formal platform?

Yes.

Renren Part-Time is a professional part-time recruitment platform that provides a variety of legal and guaranteed job opportunities. The platform cooperates with some more formal companies to ensure that users can find reliable and stable jobs. Renren also provides peace of mind and security measures, including background checks for employers and employees and payment guarantees. These measures are designed to safeguard user rights and reduce risks.