黑砖窑 Traditional 黑磚窯 hēi zhuān yáo 🔊 lit. black brick kiln + Keep this word Meanings hēi zhuān yáo 黑磚窯 lit. black brick kilnfactories that acquired notoriety in 2007 for slave labor Its characters 黑hēiblackHSK 5砖zhuānbrickHSK 6窑yáokilnHSK 7–9