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Financial Risk Management Objectives and Policies - Maturity Profile of Financial Assets and Liabilities Based on Contractual Undiscounted Payments (Detail) ¥ in Thousands, $ in Thousands | Dec. 31, 2020 CNY (¥) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 CNY (¥)
--- | --- | --- | ---
Financial assets |  |  |
Cash and bank balances | ¥ 6,447,538 | $ 996,328 | ¥ 6,390,918
Financial assets | 14,612,382 | 2,258,028 | 14,303,746
Financial liabilities |  |  |
Trade and other payables (Note 22) | 10,302,531 | 1,592,034 | 8,644,393
Lease liabilities | 39,778 | 6,147 | 60,007
Financial liabilities | 12,486,410 | 1,929,505 | 10,699,413
Liquidity risk [member] |  |  |
Financial assets |  |  |
Trade and bills receivables | 8,082,391 | 1,248,959 | 7,742,301
Other receivables, excluding tax recoverable | 76,195 | 11,774 | 161,292
Cash and bank balances | 6,447,538 | 996,328 | 6,390,918
Quoted equity securities | 6,258 | 967 | 9,235
Financial assets | 14,612,382 | 2,258,028 | 14,303,746
Financial liabilities |  |  |
Loans and borrowings | 2,277,417 | 351,926 | 2,085,456
Trade and other payables (Note 22) | 10,216,632 | 1,578,760 | 8,584,360
Lease liabilities | 47,399 | 7,324 | 65,101
Derivative not designated as hedges – foreign exchange forward contract |  |  | 999
Financial liabilities | 12,541,448 | $ 1,938,010 | 10,735,916
Liquidity risk [member] | One year or less [member] |  |  |
Financial assets |  |  |
Trade and bills receivables | 8,082,391 |  | 7,742,301
Other receivables, excluding tax recoverable | 76,195 |  | 161,292
Cash and bank balances | 6,307,538 |  | 6,390,918
Quoted equity securities | 6,258 |  | 9,235
Financial assets | 14,472,382 |  | 14,303,746
Financial liabilities |  |  |
Loans and borrowings | 1,753,142 |  | 2,085,456
Trade and other payables (Note 22) | 10,025,069 |  | 8,408,058
Lease liabilities | 24,313 |  | 29,838
Derivative not designated as hedges – foreign exchange forward contract |  |  | 999
Financial liabilities | 11,802,524 |  | 10,524,351
Liquidity risk [member] | Two to five years [member] |  |  |
Financial assets |  |  |
Cash and bank balances | 140,000 |  |
Financial assets | 140,000 |  |
Financial liabilities |  |  |
Loans and borrowings | 524,275 |  |
Trade and other payables (Note 22) | 191,563 |  | 176,302
Lease liabilities | 22,761 |  | 35,263
Financial liabilities | 738,599 |  | ¥ 211,565
Liquidity risk [member] | More than five years [member] |  |  |
Financial liabilities |  |  |
Lease liabilities | 325 |  |
Financial liabilities | ¥ 325 |  |

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