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, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Balance sheet items, except for equity accounts	6.7114		6.7114		6.3757
Items in the statements of operations and comprehensive loss	6.6144	6.4596	6.4835	6.4718