Note 3 - Summary of significant accounting policies (Detail) - The exchange rates used to translate amounts in RMB into US$	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Items in the statements of income and comprehensive income, and statements of cash flows	6.3340	6.3647	6.3275	6.5060	6.3313	6.4231