News this year that polysilicon producers such as REC Silicon had closed US factories understandably improved spirits , lifting shares of US-listed Chinese silicon maker Daqo and Korea 's OCI .
难怪今年有关多晶硅生产商（如RECSilicon）关闭美国工厂的消息令人振奋，此类消息推高了在美国上市的中国多晶硅厂商大全能源（Daqo）和韩国OCI的股价。
daqo