For Hong Kong resident Yung Xiu Kwan, 67, a proposed extradition law that would allow people in the former British colony to be sent to mainland China for trial was the final straw.

Yung is packing her bags and leaving the China-ruled city to set up a new life in proudly democratic Taiwan, fed up with what she sees as Beijing's ever encroaching grip over the city that has led to an erosion of civil liberties.

"Without freedom and democracy, it's like being put in jail, like living in a concentration camp ... without freedom, (I) would rather die," said Yung, as she waved a Taiwan flag at a massive protest in Hong Kong on Sunday.