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Lease (Details) - Schedule of lease term and discount rate | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Weighted-average remaining lease term |  |
Land use rights | 38 years 8 months 12 days | 38 years 10 months 24 days
Operating leases | 2 years 3 months 25 days | 2 years 3 months 25 days
Weighted-average discount rate |  |
Land use rights |  |
Operating leases | 5.39% | 5.88%

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