China’s test of containing the spread of COVID-19’s omicron variant has picked up pace as the Winter Olympic Games, being hosted in the national capital Beijing, are just around the corner.

Throughout the pandemic, authorities have been especially protective of Beijing since it is the seat of government and home to senior politicians, according to reports from Associated Press.

Tianjin, a city with about 14 million residents, is one of a half-dozen cities where the government is imposing lockdowns and other restrictions. Tianjin suspended train, taxi, bus and ride-hailing services to other cities. Flights and high-speed train services were canceled earlier and highways closed.