Rehab exercises after hip fracture

My father-in-law (89 years old) had an operation about 10 days ago after breaking his hip. The doctors says the operation went well but he complains of severe pain whenever moving and he has not been able to get out of bed. He also says the operated leg (from hip to knee) "feels like it does not belong to him". I understand the normal recommendation is to stand up and walk as soon as possible after the operation. He is in China and there does not seem to be a clear definition of the rehabilitation process, at this hospital anyway. Do you have any recommendation on specific activities that should be undertaken to facilitate rehab? Thanks in advance for any practical info.