On a sweltering afternoon in August, antigovernment protesters in gas masks and hard hats flooded a six-lane road, prompting riot police officers to fire tear gas. But life on that Hong Kong street continued after the clashes faded, even as the neighborhood became the focus of further unrest .

Such contrasts have been common in Hong Kong since June, when large-scale protests set off the former British colony’s worst political crisis in decades.

The ongoing demonstrations play out with a familiar cadence nearly every weekend: marches marred by violent moments between protesters and the police. Then the action is done, replaced by the usual rhythms of the neighborhoods until the chaos comes back.

To show that dissonance, the photographer Lam Yik Fei returned this month to streets where he had documented mass rallies and street clashes in recent months — capturing moments from the exact same vantage points. His diptychs illustrate the jarring contrasts that residents of the Chinese territory now regularly experience.