I can recommend one to you, Suzhou Fumotang Brand Design Co., Ltd., which is a professional one among Suzhou design companies. There are not many advertising companies that do design in Suzhou, and many of them are production and unprofessional. If you do logo and VI, you should find a professional design company. I know Fomo Hall well and have done many cases. You can search their website and see their works!
hope this helps