Where to apply for a patent in Changchun, and who is better?

Your patent application is submitted to the State Intellectual Property Office, and the regional patent office is the agency. For example, our "Yingchuang Zhongcheng Intellectual Property Agency (General Partnership)" is a service organization established by China National Intellectual Property Administration with the approval of the Provincial Patent Administration. It can accept the entrustment of the client and handle patent applications or other patent affairs in the name of the client within the scope of authorization.