Staff at silk building, Lingnan University, Guangzhou, Guangdong, China, ca. 19301920-1930"Staff of workers -- Silk Bldg. Canton Christian College. Masks to protect workers from dust caused by wings of cocoons."] A large group of Chinese men and women assembled outside of a building. Many of them wear masks over their noses and mouths.Also included in the International Mission Photography Archive.Previously included in the China Christian Colleges and Universities Image Database.still image