According to Article 24 of China's Labor Arbitration Law; The parties may entrust agents to participate in arbitration activities. To entrust others to participate in arbitration activities, a power of attorney signed or sealed by the client shall be submitted to the labor dispute arbitration commission, and the power of attorney shall specify the entrusted matters and authority.

Because minors do not have full capacity for civil conduct, they need to entrust their guardians to participate in labor arbitration activities to protect their legitimate rights and interests from infringement.