What does it mean by the last sentence?

Question

The suggested time intervals include: June 10-July 10, June 20-July 20. The universities involved in this training program in China are: Fudan University, Beijing Language & Culture University. Applicants may choose a time interval and a university according to his/her own schedule. Changes may be suggested accordingly.

Answer 1

It just means that they might suggest changing the time interval and university that you decide to pick.  This could be due to any number of external factors such as necessary paperwork, processing time, availability, etc...

Answer 2

Apparently, each university listed may not have planned the training for both the periods cited, or some may already have enrolled all that they have planned for on the date you request at the university you request.

There are 2 universities, and 2 time periods for the training.  There has to be a limit to the size of each of the classes.  If you ask for a time at one university, and that university has filled its classes for that time period, they will probably suggest that you come at the other time if you are really set on that site.  Or they may suggest the other university if you are locked into the time you requested.