Note 3 - Summary of Significant Accounting Policies - Exchange Rates Used to Translate Amounts In RMB Into US$ (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Balance sheet items, except for equity accounts	7.0795		7.0795		6.9762
Items in the statements of operations and comprehensive loss	7.0839	6.8137	7.0319	6.7808