Pro-Uighur chants and flags have become commonplace in Hong Kong's marches but Sunday's rally was the first to be specifically dedicated to Uighurs.
More than 400 pages of internal Chinese documents provide an unprecedented inside look at the crackdown on ethnic minorities in the Xinjiang region.
China has rolled out one of the world's most aggressive policing programs in the Uighurs' homeland of Xinjiang, a vast region in northwest China