Apr 16, 2009, 6:39 PM. i was at beijing, xian and shanghai end november/early december last year. it was chilly in beijing and xian. about 7-10 degrees in the day and close to freezing point at night, but still manageable. further south in shanghai, it was rather warm, actually.
Possible Causes of Numbness While Sleeping. Numbness while sleeping can be among the causes of insomnia when the loss of sensation interferes with the ability to stay asleep through the night. Pinpointing the cause of the problem can lead to a viable solution.
1 This disruption of nerve function can make your hands/arms fall asleep until blood flow improves.  Ulnar Nerve Entrapment. When your ulnar nerve, which runs from the neck down to the arm, gets compressed, it can make the hand/arm become numb.