From Tao YANG, East Asian Librarian:

We would like to announce that we have subscribed to the database China Data Online. China Data Online provides detailed official statistics on the population and economy of China. It is divided into four parts: China Statistics, Census Data, Free China Maps, and Sample Data. It also includes the newsfeed Latest China Statistical News. 

The heart of the database is the "China Statistics" and "Census Data" sections. The China Statistics section provides comprehensive and updated information on China's economic development at national, provincial, city, county, and industrial levels. This data is updated monthly. The Census Data section includes data from various censuses, including population, economic, and industrial censuses.