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Prepayments and Other Current Assets - Summary of Prepayments and Other Current Assets (Detail) ¥ in Thousands, $ in Thousands | Dec. 31, 2022 CNY (¥) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 CNY (¥)
--- | --- | --- | ---
Prepaid Expense and Other Assets, Current [Abstract] |  |  |
Prepayment for service | ¥ 11,157 | $ 1,618 | ¥ 1,672
Unbilled revenue (Note 15) | 10,800 | 1,566 |
Deductible value-added tax input | 8,976 | 1,301 | 16,487
Prepayment for acquisition of inventories | 6,910 | 1,002 | 8,286
Loans receivable – current portion (Note 9) | 4,000 | 580 |
Staff advances | 940 | 136 | 1,257
Others | 2,400 | 347 | 1,693
Total Prepayments | ¥ 45,183 | $ 6,550 | ¥ 29,395

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