Do I need to write a power of attorney to represent the patent?

Legal analysis: A power of attorney is required to represent a patent. An entrustment contract is a contract in which the principal and the trustee agree that the trustee will handle the principal's affairs. The trustor may specially entrust the trustee to handle one or more affairs, or generally entrust the trustee to handle all affairs.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 919 An entrustment contract is a contract in which the principal and the agent agree that the agent shall handle the principal's affairs.

Article 920 The principal may entrust the agent to handle one or more specific affairs, or may entrust the agent to handle all general affairs.