According to the Exit and Entry Bureau of China, You MUST register your residence information within 24 hours after arriving China. Show your passport and register at the university dormitory or hotel you stay in. If you live in friend's or relative’s house, you should register at the local police station. A fine will be imposed by Police if you fail to do so; which may also affect your visa renewal in future.
请务必在到达中国 24 小时内办理住宿登记手续。办理住宿登记手续时请出示护照及您在中国的住宿登记信息。如果您入住亲友家中，请在当地公安机关登记。如果您没有办理相关登记将会被公安机关处以罚款。