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Summary of Significant Accounting Policies (Details)
¥ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 14, 2020
USD ($)
Jun. 30, 2020
USD ($)
shares
Jun. 30, 2019
USD ($)
shares
Jun. 30, 2020
USD ($)
shares
Jun. 30, 2019
USD ($)
shares
Dec. 31, 2019
USD ($)
Jan. 14, 2020
CNY (¥)
Summary of Significant Accounting Policies (Details) [Line Items]              
Business acquisition, description       The CFS include the accounts of CREG and its subsidiaries, Shanghai Yinghua Financial Leasing Co., Ltd. (“Yinghua”) and Sifang Holdings; Sifang Holdings’ wholly owned subsidiaries, Huahong New Energy Technology Co., Ltd. (“Huahong”) and Shanghai TCH Energy Tech Co., Ltd. (“Shanghai TCH”); Shanghai TCH’s wholly-owned subsidiary, Xi’an TCH Energy Tech Co., Ltd. (“Xi’an TCH”); and Xi’an TCH’s subsidiaries, 1) Erdos TCH Energy Saving Development Co., Ltd (“Erdos TCH”), 100% owned by Xi’an TCH (See note 1), 2) Zhonghong, 90% owned by Xi’an TCH and 10% owned by Shanghai TCH, and 3) Zhongxun, 100% owned by Xi’an TCH. Substantially all the Company’s revenues are derived from the operations of Shanghai TCH and its subsidiaries, which represent substantially all the Company’s consolidated assets and liabilities as of June 30, 2020.      
Net Loss   $ 993,940 $ (5,263,089) $ 395,389 $ (7,205,383) $ 8,780,000  
Accumulated deficit   (46,193,064)   (46,193,064)   (46,447,959)  
Cash on hand   62,670,000   62,670,000      
Recognized total Right of Use Asset (“ROU”)   21,655   $ 21,655   54,078  
Accounts receivable, description       the Company had gross accounts receivable of $36.06 million; of which, $13.71 million was for transferring the ownership of Huayu and Shenqiu Phase I and II systems to Mr. Bai; $4.23 million was from the sales of CDQ and a CDQ WHPG system to Zhongtai, $16.95 million was from transferring the ownership of Tian’an project to Tianyu, and $1.16 million accounts receivable of Erdos TCH for electricity sold. As of December 31, 2019, the Company had gross accounts receivable of $48.06 million; of which, $35.42 million was for transferring the ownership of Huayu and Shenqiu Phase I and II systems to Mr. Bai; $10.03 million was from the sales of CDQ and a CDQ WHPG system to Zhongtai, and $2.61 million accounts receivable of Erdos TCH for electricity sold. As of June 30, 2020, the Company had bad debt allowance of $4,237,587 for Zhongtai and $31,611 for Erdos TCH due to not making the payments as scheduled. As of December 31, 2019, the Company had bad debt allowance of $5,733,781 for Zhongtai and $261,430 for Erdos TCH due to not making the payments as scheduled. In June 2020, Xuzhou Zhongtai collected RMB 10 million ($1.41 million) accounts receivable. In June 2020, Erdos TCH collected RMB 10 million ($1.41 million) accounts receivable; on July 2020, Erdos TCH collected additional RMB 6 million ($0.86 million) accounts receivable; as a result, the Company made a reversal of bad debts allowance of $1,649,622, of which $1,422,090 was for Zhongtai and $227,532 was for Erdos TCH during the three months ended June 30, 2020.      
Interest receivable on sales type leases           5,245,244  
Net investment in sales-type leases       $ 0   8,287,560  
Bad debt allowance for net investment receivable   0   0   24,416,441  
Asset impairment loss   $ 0   $ 0   876,660  
Shares of antidilutive securities under warrants and option (in Shares) | shares   31,311 213,304 31,311 213,304    
Number of industry segment       1      
Erdos TCH [Member]              
Summary of Significant Accounting Policies (Details) [Line Items]              
Bad debt allowance       $ 31,611      
Xian Tch [Member]              
Summary of Significant Accounting Policies (Details) [Line Items]              
Recognized total Right of Use Asset (“ROU”)   $ 21,655   $ 21,655   116,917  
Operating lease liability           $ 116,917  
Xian Tch [Member] | Pucheng Systems [Member]              
Summary of Significant Accounting Policies (Details) [Line Items]              
Net investment in sales-type leases $ 14,000,000            
Interest Of Investment $ 5,300,000            
Xian Tch [Member] | China, Yuan Renminbi | Pucheng Systems [Member]              
Summary of Significant Accounting Policies (Details) [Line Items]              
Bad debt allowance for net investment receivable | ¥             ¥ 97.6