There are many sources of information for Asia. The following are some good ones:

Country Information

The CIA World Factbook
An excellent source of economic, demographic, and political information on more than 250 countries. The site is updated periodically, with a major update every year.
http://www.cia.gov/cia/publications/factbook/index.html


Country Reports from The Economist
News, country profiles, forecasts, statistics and more on 60 countries. Much of the information is free, and "premium" content, i.e., information that costs extra, is clearly marked.
http://www.economist.com/countries/


City Guides from The Economist
A comprehensive resource for business travelers, with quick and easy information on everything from business etiquette to hotels, restaurants, business services, museums, sightseeing, economic profiles and monthly news briefings.
http://www.economist.com/cities


International Statistical Agencies
Links to sources of statistical data for the U.S. and more than 50 countries
http://www.bls.gov/bls/other.htm


Singapore Department of Statistics
Provides a wide range of current statistical data on the physical, demographic, economic and social characteristics of Singapore. Most of the data are in the form of monthly or quarterly time series.
http://www.singstat.gov.sg/


HK Statistics
Provides a wide range of current statistical data on the physical, demographic, and economic characteristics of Hong Kong.
http://www.info.gov.hk/censtatd/eng/hkstat/index.html


China Statistics: National Bureau of Statistics China
http://www.stats.gov.cn/english/index.htm


Statistics Indonesia
http://www.bps.go.id/index.shtml

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