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v3.21.1

Summary of Significant Accounting Policies and Practices (Details 1) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Income statement and cash flows [Member] |  |
Foreign currency transactions, description | RMB 6.9032 to US$1.00 | RMB 6.9073 to US$1.00
Balance sheet, except for equity accounts [Member] |  |
Foreign currency transactions, description | RMB 6.5286 to US$1.00 | RMB 6.9630 to US$1.00

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- Details
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- Details
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