http://www.gov.cn/english/laws/2005-09/22/content_68710.htmArticle 8 The request for extradition made by a foreign state to the People's Republic of China shall be rejected if:
(1) the person sought is a national of the People's Republic of China under the laws of the People's Republic of China;
Good research. But what makes you think these people are even Chinese? If they are scammers thay are using the 'China issue' as a barrier to extradition to put off investigators, it won't work. They are more likely in the West.
start by message mr howard wang first and see what his response is. he is actually in the US now