Legal analysis: effective. According to the relevant laws and regulations of our country, the written power of attorney for entrusted agency shall specify the agent's name, agency matters, authority and time limit, and shall be signed or sealed by the principal. A power of attorney is an expression of the will of both parties. In principle, the trustee needs to sign to express his consent to the entrustment, which will take effect once signed. However, if the trustee fails to sign, the act of the trustee showing the power of attorney to the third party can also be regarded as the recognition of the entrustment, and the entrustment will take effect. If the trustee cannot produce it, the trustee may terminate the entrustment at any time.

Legal basis: Article 165 of the Civil Code of People's Republic of China (PRC) * * * If the power of attorney is in written form, the power of attorney shall specify the agent's name, agency matters, authority and time limit, and shall be signed or sealed by the client.