Annual report pursuant to Section 13 and 15(d)

Lines of credit (Details)

v3.7.0.1
Lines of credit (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Line of Credit Facility [Line Items]    
Line of credit $ 60,407,928 $ 75,032,933
Unused line of credit $ 22,077,401 $ 34,994,054
Bank of China [Member]    
Line of Credit Facility [Line Items]    
Starting date [1] Jul. 11, 2016 Jul. 13, 2015
Maturity date [1] Jul. 11, 2019 Sep. 13, 2016
Line of credit [1] $ 12,590,290 $ 13,762,455
Unused line of credit [1] $ 1,444,934 $ 4,707,595
Bank of China [Member]    
Line of Credit Facility [Line Items]    
Starting date [1] Jul. 12, 2016 Jul. 01, 2015
Maturity date [1] Jul. 12, 2019 Jun. 30, 2016
Line of credit [1] $ 10,483,344 $ 11,203,276
Unused line of credit [1] $ 111 $ 155,498
China Everbright Bank Co., Ltd. [Member]    
Line of Credit Facility [Line Items]    
Starting date [1] Dec. 28, 2016 Jun. 23, 2015
Maturity date [1] Dec. 27, 2017 Jun. 22, 2016
Line of credit [1] $ 7,194,452 $ 7,688,523
Unused line of credit [1] $ 7,194,452 $ 3,647,289
Industrial and Commercial Bank of China [Member]    
Line of Credit Facility [Line Items]    
Starting date [1] Jul. 01, 2016 Oct. 01, 2015
Maturity date [1] Jun. 30, 2017 Oct. 01, 2016
Line of credit [1] $ 7,194,452 $ 7,688,523
Unused line of credit [1] $ 4,316,671 $ 4,613,113
Ping An Bank Co., Ltd [Member]    
Line of Credit Facility [Line Items]    
Starting date   Dec. 10, 2015
Maturity date   Dec. 09, 2016
Line of credit   $ 10,763,931
Unused line of credit   $ 3,878,818
China Minsheng Banking Corp., Ltd. [Member]    
Line of Credit Facility [Line Items]    
Starting date [1] Nov. 01, 2016 Jul. 16, 2015
Maturity date [1] Nov. 01, 2017 Jul. 16, 2016
Line of credit [1] $ 3,597,226 $ 4,393,441
Unused line of credit [1] $ 287,778 $ 1,916,253
Industrial Bank Co., Ltd. [Member]    
Line of Credit Facility [Line Items]    
Starting date [1] Oct. 28, 2016 Jul. 15, 2015
Maturity date [1] Oct. 28, 2017 Jul. 15, 2016
Line of credit [1] $ 7,194,452 $ 9,226,227
Unused line of credit [1] $ 2,409,882 $ 7,079,785
Hua Xia Bank Co., Ltd. [Member]    
Line of Credit Facility [Line Items]    
Starting date [2] Jun. 01, 2016  
Maturity date [2] Jun. 01, 2017  
Line of credit [2] $ 4,316,671  
Unused line of credit [2] $ 2,298,681  
Jiang Su Bank Co., Ltd. [Member]    
Line of Credit Facility [Line Items]    
Starting date   Nov. 04, 2015
Maturity date   Nov. 03, 2016
Line of credit   $ 2,306,557
Unused line of credit   $ 995,703
Bank Of China [Member]    
Line of Credit Facility [Line Items]    
Starting date [1] Jul. 25, 2016  
Maturity date [1] Jul. 25, 2019  
Line of credit [1] $ 3,837,041  
Unused line of credit [1] $ 124,892  
Hongkong and Shanghai Banking Corporation Limited [Member]    
Line of Credit Facility [Line Items]    
Starting date [1] Aug. 26, 2016 Sep. 01, 2015
Maturity date [1] Jul. 15, 2017 Jul. 15, 2016
Line of credit [1] $ 4,000,000 $ 8,000,000
Unused line of credit [1] $ 4,000,000 $ 8,000,000
[1] The lines of credits are guaranteed by the Company’s Chief Executive Officer, Mr. Dang Yu Pan.
[2] The lines of credit is guaranteed by the Company’s Chief Executive Officer, Mr. Dang Yu Pan, and his wife.