The document summarizes key findings from an industry report on the optical glass manufacturing industry in China. It finds that the major distribution areas for the industry are Jiangsu, Guangdong, Shandong, and the secondary areas are Fujian, Sichuan, Shanghai, Zhejiang, Anhui, Beijing and Liaoning. It also provides an overview of the report, which analyzes industry data by region and ownership type to identify hot regions for investment and compares performance of state-owned, private, and foreign enterprises. The report uses an index developed by Zeefer Consulting to measure industry concentration in different provinces.