SCHEDULE I - PARENT ONLY FINANCIAL INFORMATION (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current Assets
Prepayments and deposits	$ 6,146,461	$ 1,332,970
Total Current Assets	107,310,965	107,202,708
Non-Current Assets
Total Non-Current Assets	186,726,853	172,048,277
Total Assets	294,037,818	279,250,985
Current Liabilities
Other payables and accrued expenses	5,081,701	1,106,048
Total Current Liabilities	7,102,300	6,306,264
Total Liabilities	17,013,545	16,143,885
Stockholders' Equity
PREFERRED STOCK; $0.001 par value; 1,000,000 shares authorized; none outstanding	0	0
COMMON STOCK; $0.0005 par value; 80,000,000 shares authorized; 10,043,307and 9,563,257 shares issued; and 9,997,477 and 9,517,427 shares outstanding as of December 31, 2020 and December 31, 2019	24,139	23,904
Treasury stock; 45,830 and 45,830 shares as of December 31, 2020 and December 31, 2019 at cost	(510,329)	(510,329)
Additional paid-in capital	97,435,316	95,043,388
Retained earnings unappropriated	151,388,356	159,808,400
Retained earnings appropriated	24,233,544	24,233,544
Total Stockholders' Equity	277,024,273	263,107,100	$ 293,853,404
Total Liabilities and Stockholders' Equity	294,037,818	279,250,985
Parent
Current Assets
Prepayments and deposits	0	0
Total Current Assets	0	0
Non-Current Assets
Interests in subsidiaries	214,505,860	200,057,813
Amounts due from group companies	62,987,953	63,546,235
Total Non-Current Assets	277,493,813	263,604,048
Total Assets	277,493,813	263,604,048
Current Liabilities
Other payables and accrued expenses	326,839	354,247
Amounts due to group companies	142,701	142,701
Total Current Liabilities	469,540	496,948
Total Liabilities	469,540	496,948
Stockholders' Equity
PREFERRED STOCK; $0.001 par value; 1,000,000 shares authorized; none outstanding	0	0
COMMON STOCK; $0.0005 par value; 80,000,000 shares authorized; 10,043,307and 9,563,257 shares issued; and 9,997,477 and 9,517,427 shares outstanding as of December 31, 2020 and December 31, 2019	24,139	23,904
Treasury stock; 45,830 and 45,830 shares as of December 31, 2020 and December 31, 2019 at cost	(510,329)	(510,329)
Additional paid-in capital	97,435,316	95,043,388
Retained earnings unappropriated	151,388,356	159,808,400
Retained earnings appropriated	24,233,544	24,233,544
Cumulative translation adjustment	4,453,247	(15,491,807)
Total Stockholders' Equity	277,024,273	263,107,100
Total Liabilities and Stockholders' Equity	$ 277,493,813	$ 263,604,048