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Summary of Significant Accounting Policies (Details) - USD ($) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Accounting Policies [Abstract] |  |  |  |
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, 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 March 31, 2021. |  |  |
Net loss | $ 280,000 | $ 600,000 |  |
Accumulated deficit | 43,310,000 |  |  |
Cash | 144,071,303 | 55,028,489 | $ 107,804,013 | $ 16,221,297
Cash on hand | 144,071,303 |  | 107,804,013 |
Recognized total Right of Use Asset (“ROU”) | $ 173,502 |  |  |
Accounts receivable, description | As of March 31, 2021 and December 31, 2020, the Company had bad debt allowance of $34,055 and $34,297 for Erdos TCH due to the customer not making the payments as scheduled, respectively. |  |  |
Description of insurance policy | Balances at financial institutions and state-owned banks within the PRC are covered by insurance up to RMB 500,000 (US$76,000) per bank. Any balance over RMB 500,000 (US$76,000) per bank in PRC will not be covered. At March 31, 2021, cash held in the PRC bank of $143,935,525 was not covered by such insurance. The Company has not experienced any losses in such accounts. |  |  |
Asset impairment loss | $ 0 | $ 3 |  |
Shares of antidilutive securities under warrants and option (in Shares) | 31,311 |  |  |

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