Yes, there are schools where tuition is lower than 200,000 rmb. However, I do not recommend you to transfer from the current international school to another school as 12th grade. There are few reasons why. First, if your goal is to apply to US university, your senior transcript will not be reflected in the process of application (for some cases, you need to submit the first semester report card). If you plan to improve your GPA at the new school while thinking that would be beneficial to you, I would say there is very slim chance to do that. Second, not so many US schools, especially good schools, would like to receive students as seniors except some extraordinary cases. Receiving students as senior means that after one year, the school need to grand high。