A year after Hong Kong riot police fired tear gas at pro-democracy protesters in scenes that made headline news around the world, Reuters photographer Tyrone Siu revisited the scenes of the demonstrations. The anniversary comes amid a passionate debate in Hong Kong about the extent of mainland China’s control of the city.

By Reuters

A combination picture shows protesters opening their umbrellas, symbols of the pro-democracy movement, as they mark exactly one month since they took to the streets in Hong Kong’s financial central district in this Oct. 28, 2014 photo (top) and the same location on Sept. 16.