Brave Eu

If the 15000 RMB you mentioned is a monthly salary then that translates to nearly 2000 American dollars ( just over 8 RMB equates to one American dollar). That salary is well above average for foreign teachers in China! In government schools in China the average monthly salary is usually between 4000-6000 RMB per month, so 15000 RMB a month in China is well paid by any standard. However you need to find out what is required from the company/school in return for that salary. They may be requiring you to work all the hours in creation. For 4000-5000 RMB a month at a school in China, you would usually work 12-16 hours a week.
If your institution requires three or four times those hours from you then that salary in a relative sense would not be so high after all. You need to do some background checks and find out in detail exactly what they want from you, first.That salary sounds good, but tread carefully!