Before you go on the long journey to China, you had better check with your key suppliers or possible new suppliers you want to meet for their booth number and location at the Trade Fair. You can then coordinate your Trade Fair schedule better by organizing your appointments according to their booth locations.
I can tell you from my experience, it will be very difficult to fix a specific time for your appointments because the exhibitor booths are always too crowded.
There may be some online information from the Trade Fair organizers but either it is available too late for advanced planning or it is too confusing because there are so many exhibitors and their names do not mean anything to you when you are new to importing.