Schedule I - Parent Only Financial Information - Condensed Balance Sheets (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current Assets
Prepayments and deposits	$ 4,450,037	$ 6,146,461
Total Current Assets	115,434,862	107,310,965
Non-Current Assets
Total non-current assets	194,422,000	186,726,853
Total Assets	309,856,862	294,037,818
Current Liabilities
Other payables and accrued expenses	10,530,776	5,081,701
Amounts due to related party	1,849,044	0
Total Current Liability	13,889,536	7,102,300
Total Liabilities	$ 23,217,645	$ 17,013,545
Stockholders’ Equity
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares outstanding	0	0
COMMON STOCK; $0.0005 par value; 80,000,000 shares authorized; 10,517,754 and 10,043,307 shares issued; and  10,471,924 and 9,997,477 shares outstanding as of December 31, 2021 and December 31, 2020	$ 24,376	$ 24,139
Common stock, par value	$ 0.0005	$ 0.0005
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares issued	10,517,754	10,043,307
Common stock, shares outstanding	10,471,924	9,997,477
Treasury stock; 45,830 and 45,830  shares as of December 31, 2021 and December 31, 2020 at cost	$ (510,329)	$ (510,329)
Treasury stock, shares	45,830	45,830
Additional paid-in capital	$ 100,569,159	$ 97,435,316
Retained earnings unappropriated	150,463,638	151,388,356
Retained earnings appropriated	24,233,544	24,233,544
Total Stockholders’ Equity	286,639,217	277,024,273	$ 263,107,100
Total Liabilities and Stockholders’ Equity	309,856,862	294,037,818
Parent
Current Assets
Prepayments and deposits	0	0
Total Current Assets	0	0
Non-Current Assets
Interests in subsidiaries	224,559,060	214,505,860
Amounts due from group companies	63,039,564	62,987,953
Total non-current assets	287,598,624	277,493,813
Total Assets	287,598,624	277,493,813
Current Liabilities
Other payables and accrued expenses	216,940	326,839
Amounts due to related party	599,766	0
Amounts due to group companies	142,701	142,701
Total Current Liability	959,407	469,540
Total Liabilities	959,407	469,540
Stockholders’ Equity
PREFERRED STOCK; $0.001 par value; 1,000,000 shares authorized; none outstanding	$ 0	$ 0
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares outstanding	0	0
COMMON STOCK; $0.0005 par value; 80,000,000 shares authorized; 10,517,754 and 10,043,307 shares issued; and  10,471,924 and 9,997,477 shares outstanding as of December 31, 2021 and December 31, 2020	$ 24,376	$ 24,139
Common stock, par value	$ 0.0005	$ 0.0005
Common stock, shares authorized	80,000,000	80,000,000
Common stock, shares issued	10,517,754	10,043,307
Common stock, shares outstanding	10,471,924	9,997,477
Treasury stock; 45,830 and 45,830  shares as of December 31, 2021 and December 31, 2020 at cost	$ (510,329)	$ (510,329)
Treasury stock, shares	45,830	45,830
Additional paid-in capital	$ 100,569,159	$ 97,435,316
Retained earnings unappropriated	150,463,638	151,388,356
Retained earnings appropriated	24,233,544	24,233,544
Cumulative translation adjustment	11,858,829	4,453,247
Total Stockholders’ Equity	286,639,217	277,024,273
Total Liabilities and Stockholders’ Equity	$ 287,598,624	$ 277,493,813