Protesters gather for a rally Sunday in Hong Kong. Many of the pro-democracy demonstrators have brandished umbrellas in a nod to a symbol widely used during the semiautonomous city’s massive 2014 protests.

Protesters gather for a rally Sunday in Hong Kong. Many of the pro-democracy demonstrators have brandished umbrellas in a nod to a symbol widely used during the semiautonomous city’s massive 2014 protests.