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Commitments and contingencies | 6 Months Ended
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Jun. 30, 2021
Commitments and Contingencies Disclosure [Abstract] |
Commitments and Contingencies | 9 Commitments and contingencies Operating lease commitments The Company leases office premises in the PRC under non-cancellable operating leases ranging from six months to five years. Payments under operating leases are expensed on a straight-line basis over the periods of the respective leases. Total operating lease expenses were RMB7,640 and RMB6,509 (US$1,008) for the six months ended June 30, 2020 and 2021, respectively. As of June 30, 2021, future minimum payments under non-cancellable operating leases were as follows:
|  | RMB |  |  | US$ |
For the six months ended December 31, 2021 |  |  | 4,477 |  |  |  | 693 |
For the years ended December 31, |  |  |  |  |  |  |  |
2022 |  |  | 9,333 |  |  |  | 1,445 |
2023 |  |  | 6,577 |  |  |  | 1,019 |
2024 |  |  | 5,381 |  |  |  | 833 |
Total |  |  | 25,768 |  |  |  | 3,990 |
The Company’s operating lease commitments have no renewal options, rent escalation clauses and restrictions or contingent rents. There are no lease payments in 2025 and after. Capital commitments As of June 30, 2021, future minimum payment under non-cancellable purchase commitment is nil.

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