Bank Loans (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Schedule of bank loans
Bank loans	$ 46,919,680	$ 29,185,381
Nanjing Bank [Member]
Schedule of bank loans
Bank loans	16,743,277	11,731,223
Shanghai Pudong Development Bank [Member]
Schedule of bank loans
Bank loans	7,014,833	8,966,382
Bank of Communications [Member]
Schedule of bank loans
Bank loans	6,953,834	2,660,562
HSBC [Member]
Schedule of bank loans
Bank loans	5,414,316	532,944
Everbright Bank [Member]
Schedule of bank loans
Bank loans	3,166,000
China Minsheng Banking [Member]
Schedule of bank loans
Bank loans	4,239,800
Bank of China [Member]
Schedule of bank loans
Bank loans	3,387,620
Industrial and Commercial Bank of China [Member]
Schedule of bank loans
Bank loans		$ 5,294,270