Bank Loans (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Schedule of bank loans
Bank loans	$ 44,823,302	$ 46,919,680
Nanjing Bank [Member]
Schedule of bank loans
Bank loans	14,079,204	16,743,277
Shanghai Pudong Development Bank [Member]
Schedule of bank loans
Bank loans	6,464,000	7,014,833
Bank of Communications [Member]
Schedule of bank loans
Bank loans	9,703,498	6,953,834
HSBC [Member]
Schedule of bank loans
Bank loans	2,424,000	5,414,316
Everbright Bank [Member]
Schedule of bank loans
Bank loans	3,232,000	3,166,000
China Minsheng Bank [Member]
Schedule of bank loans
Bank loans	1,062,152	4,239,800
Bank of China [Member]
Schedule of bank loans
Bank loans	5,670,220	3,387,620
Ping An Bank [Member]
Schedule of bank loans
Bank loans	572,228
Hua Xia Bank [Member]
Schedule of bank loans
Bank loans	$ 1,616,000