Thousands of people in Hong Kong protested the jailing of three pro-democracy leaders for their roles in the so-called umbrella revolution nearly three years ago.
Joshua Wong and two other student leaders were sentenced last week.
It is the latest sign that tolerance for dissent is waning in the Beijing-ruled former British colony.
The three were found guilty last year of leading or encouraging an illegal rally in September 2014.
Activists had brought the city to a standstill for weeks to protest against Beijing’s plan to restrict elections in Hong Kong.
Yellow umbrellas became a symbol of revolution after the activists used them to fend off police pepper spray attacks.