This one is delicate. Sure it wasn’t all your fault, but you have been told at least ones before and allow us to kindly remember you one more time: never ever throw toilet paper into the toilet! The Chinese sewage system just isn’t dimensioned for this. Instead, use the waste bin next to the toilet. It undoubtedly takes a little time to get used to it, but nonetheless it’s necessary!
Once the problem is there the best solution at hand would be a simple plunger and a quick prayer that “things” will dissolve and soon flow smoothly again. If you still find yourself totally “stuck” in the situation, please contact your landlord first. If it turns out to be a bigger problem that requires reparation or replacement and eventually payment, ask the ECCS office to help you to broker a deal.