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Other Income and Expenses - Summary of Depreciation, Amortisation and Costs of Inventories (Details) - CNY (¥)
¥ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Depreciation Amortisation And Costs Of Inventories [Line Items]      
Depreciation of property, plant and equipment ¥ 10,709 ¥ 2,257 ¥ 1,251
Depreciation of right-of-use assets 4,139 4,480 1,618
Amortisation of intangible assets 8,422 5,366 3,762
Included in Cost of Sales      
Depreciation Amortisation And Costs Of Inventories [Line Items]      
Depreciation of property, plant and equipment 9,709 1,448 233
Depreciation of right-of-use assets 696 1,955 66
Amortisation of intangible assets 8,271 5,326 3,720
Costs of inventories recognised as an expense 18,782 11,489 12,465
Included in Selling Expenses      
Depreciation Amortisation And Costs Of Inventories [Line Items]      
Depreciation of right-of-use assets 821 516 489
Included in Administrative Expenses      
Depreciation Amortisation And Costs Of Inventories [Line Items]      
Depreciation of property, plant and equipment 1,000 809 1,018
Depreciation of right-of-use assets 2,622 2,009 1,063
Amortisation of intangible assets ¥ 151 ¥ 40 ¥ 42