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Cash cash equivalents and restricted cash (Details) - CNY (¥)
¥ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Cash On Hand ¥ 40 ¥ 20
Cash At Bank 310 11
Restricted Cash At Bank(1) 46 66
Cash, Cash Equivalents And Restricted Cash Per Consolidated Statements Of Cash Flow ¥ 396 ¥ 97