What are the company names of Shanghai patent application institutions?

In Shanghai, the time-honored patent agencies are still professional and have been ahead of other firms in Shanghai, which can be called the first echelon; In the second echelon below, I think Guanghua, Li Shuo, Baiyi and Bixing are not bad, with a certain scale, the number of applications is basically above 1000 per year, and the management is relatively standardized; Then there is the third echelon, which is mainly composed of youth research institutes established in recent years. The scale is a little small now, and it is estimated that it should be done in a few years. The fourth echelon is an unqualified black intermediary. Their main businesses are trademarks, company registration, bookkeeping, science and technology policies, etc. Seeing that customers have patent requirements, they will take over and subcontract to other personal agents or small agents. Our company is an intellectual property agency in Li Shuo. You can go and have a look.