Beijing has begun operating mobile sampling vehicles to facilitate COVID-19 tests for residents. /VCG

The first two buses were put into use on Sunday in two districts of the city. /VCG

With the constant room temperature of 20 degrees Celsius and a well-maintained ventilation and sterilization system, the buses are able to provide better working conditions for medical workers in hot summer. /VCG

The buses can gather throat swab samples from 200 to 300 people an hour, if fully operated. /VCG