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Leases - Summary of Detailed Information About Future Minimum Rental Receivables Under Non-Cancellable Operating Leases (Detail) ¥ in Thousands, $ in Thousands | Dec. 31, 2020 CNY (¥) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 CNY (¥)
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Disclosure of maturity analysis of operating lease payments [line items] |  |  |
Future minimum operating leases | ¥ 51,108 | $ 7,898 | ¥ 24,592
Within 1 Year [member] | Related parties [member] |  |  |
Disclosure of maturity analysis of operating lease payments [line items] |  |  |
Future minimum operating leases | 902 | 139 | 1,787
Within 1 Year [member] | Joint ventures [member] |  |  |
Disclosure of maturity analysis of operating lease payments [line items] |  |  |
Future minimum operating leases | 2,590 | 400 | 2,691
Within 1 Year [member] | Third parties [member] |  |  |
Disclosure of maturity analysis of operating lease payments [line items] |  |  |
Future minimum operating leases | 5,058 | 782 | 892
After 1 Year but within 5 years [member] | Related parties [member] |  |  |
Disclosure of maturity analysis of operating lease payments [line items] |  |  |
Future minimum operating leases |  |  | 660
After 1 Year but within 5 years [member] | Joint ventures [member] |  |  |
Disclosure of maturity analysis of operating lease payments [line items] |  |  |
Future minimum operating leases | 10,720 | 1,657 | 10,526
After 1 Year but within 5 years [member] | Third parties [member] |  |  |
Disclosure of maturity analysis of operating lease payments [line items] |  |  |
Future minimum operating leases | 13,305 | 2,056 | 1,504
After than 5 years [member] | Joint ventures [member] |  |  |
Disclosure of maturity analysis of operating lease payments [line items] |  |  |
Future minimum operating leases | 14,141 | 2,185 | 5,643
After than 5 years [member] | Third parties [member] |  |  |
Disclosure of maturity analysis of operating lease payments [line items] |  |  |
Future minimum operating leases | ¥ 4,392 | $ 679 | ¥ 889

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- Definition The amount of undiscounted operating lease payments to be received. Operating lease is a lease that does not transfer substantially all the risks and rewards incidental to ownership of an underlying asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2020-01-01 -Paragraph 97 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_97&doctype=Standard -URIDate 2020-01-01 + Details
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