Ten firefighters from the fire brigade at East Lake High-tech Development Zone -- also known as the Optics Valley of China -- in Wuhan, capital of Central China's Hubei province, wear protective clothing and carry disinfectant sprayers. Officials said they started to disinfect a residential community on March 11. According to local media reports, they will disinfect over 40 residential communities in Optics Valley's Guandong sub-district this month. [Photo/cjn.cn]