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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

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