Xinhua, the Chinese news agency ran a photoessay on Chinese Muslim Funeral Ceremony (Janaza) in the Nixgia region where Muslims form a majority. You can check at out at this URL. Interestingly they note that the sixty person of Muslims in the village have the family name of Na.
http://news.xinhuanet.com/english/2008-05/20/content_8215874.htm
Islam in China 
Very interesting. What does the family name Na, mean?
Ya Haqq!
darvish, Actually I am not that sure about the origin.