Shanghai Qianghua Quartz Corp. was established in 1999, and Shanghai Qianghua Industrial Corp. Qianghua Industrial's subsidiaries include SHANGHAI LANGSHENG SCIENCE & TECHNOLOGY CO.,LTD. (imports and exports),among others, was established in 2009, and is a domestic professional quartz device processor. Qianghua Industrial's subsidiaries include SHANGHAI LANGSHENG SCIENCE & TECHNOLOGY CO.,LTD. (imports and exports),among others.The company develops and manufactures high-purity, high-precision quartz and related materials and devices to serve the semiconductor, photovoltaic, and optical fiber industries by ......