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Trade and Other Receivables - Summary of Trade and Other Receivables (Detail) ¥ in Thousands, $ in Thousands | Dec. 31, 2020 CNY (¥) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 CNY (¥)
--- | --- | --- | ---
Current |  |  |
Trade receivables, gross | ¥ 332,567 | $ 51,391 | ¥ 794,678
Less: Allowance for expected credit losses | (43,519) | (6,725) | (57,611)
Net trade receivables (Note 6.2) | 289,048 | 44,666 | 737,067
Bill receivables | 7,793,343 | 1,204,293 | 7,005,234
Total (Note 34) | 8,082,391 | 1,248,959 | 7,742,301
Current receivables from associates and joint ventures (trade) | 1,266 | 196 | 609
Current receivables from associates and joint ventures (non-trade) | 11,119 | 1,718 | 11,185
Current receivables from related parties (trade) | 9,663 | 1,493 | 73,243
Current receivables from related parties (non-trade) | 2,992 | 462 | 2,092
Staff advances | 3,326 | 514 | 7,133
Interest receivables | 4,999 | 772 | 12,224
Bills receivable in transit | 12,620 | 1,950 | 8,700
Refundable deposits | 283 | 44 | 2,131
Others | 36,668 | 5,667 | 49,218
Less: Impairment losses – other receivables | (6,741) | (1,042) | (5,243)
Other receivables carried at amortized cost (Note 34) | 76,195 | 11,774 | 161,292
Tax recoverable | 236,400 | 36,531 | 223,652
Prepayments | 64,102 | 9,906 | 63,048
Net other receivables | 376,697 | 58,211 | 447,992
Total trade and other receivables | ¥ 8,459,088 | $ 1,307,170 | ¥ 8,190,293

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