Guinea-Bissau:

Portuguese natives comprise a very small percentage of Guinea-Bissauans. After Guinea-Bissau gained independence, most of the Portuguese nationals left the country. The country has a tiny Chinese population. These include traders and merchants of mixed Portuguese and Chinese ancestry from Macau, a former Asian Portuguese colony.

Please answer a question about this article. If the question is unanswerable, say "unanswerable". What is the ancestry of the Chinese population in Guinea-Bissau?
mixed Portuguese and Chinese ancestry