If you want to take one-on-one courses, you can have enough time to interact with teachers and consider institutions that teach foreigners to learn Chinese; This kind of general class time can be chosen by yourself, and the class place is more flexible. Many institutions provide foreign teachers to students' families or companies, such as Fengfeng Chinese, Hong En Chinese and Chinese Taipei Language Institute Suzhou Branch. These are all very good. You can consult and compare more before making a decision.