Peng Guolong works in his studio at the China Nuo Culture ... participants would don carved masks made of bone and shells and chant "nuo, nuo" to drive away the devil. Though a lot has changed ...

The exterior of Chinese factory Shanghai Dasheng in Shanghai, China, May 6, 2020. An AP investigation has tracked counterfeit N95 masks produced by Shanghai Dasheng entering the U.S. mediical supply ...