Yuegezhuang wholesale market in the Fengtai District was thoroughly disinfected on Tuesday after a COVID-19 cluster appeared in Beijing. /CFP

Over 30 volunteers from Blue Sky Rescue, one of the biggest NGOs in China dedicated to rescue work and disaster relief, joined the operation. /CFP

Ready to go. /CFP

Local authorities ordered a wide inspection over food security on Saturday, especially in wholesale markets, supermarkets and grocery stores, after numerous cases were registered at the district's Xinfadi market. /CFP

Earlier, tests of 155 samples collected at the Yuegezhuang wholesale market surroundings were negative, officials of the Fengtai District announced on Sunday. /CFP