China Patent Agency Hong Kong Company; Beijing Liu Chen Law Firm; China Council for the Promotion of International Trade Patent Office; Zhongke Patent and Trademark Agency Company; Shanghai Patent and Trademark Affairs Company; Beijing Jijia Intellectual Property Agency Company, etc. You can do it. The key is that you have to put forward some requirements yourself, or ask to read the manuscript before sending it to the official to see if it is done well. In fact, whether the examples of the instructions are sufficient (as many examples as possible, you have to ask for as many examples as possible). It is critical to provide some mutually alternative embodiments) disclosure and whether the deployment of the claims is reasonable (leveled protection).