Note 3 - Summary of significant accounting policies (Details) - The exchange rates used to translate amounts in RMB into US$	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013	Jun. 30, 2012
Note 3 - Summary of significant accounting policies (Details) - The exchange rates used to translate amounts in RMB into US$ [Line Items]
Items in the statements of income and comprehensive income, and statements of cash flows	6.1882	6.3161	6.2105	6.3309