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PREPAID LAND LEASE PAYMENTS
12 Months Ended
Dec. 31, 2018
Leases [Abstract]  
PREPAID LAND LEASE PAYMENTS
11.
PREPAID LAND LEASE PAYMENTS
 
 
 
As at December 31,
 
 
 
2017
 
 
2018
 
 
2018
 
 
 
RMB
 
 
RMB
 
 
US$
 
Prepaid land lease payments
 
 
456,823
 
 
 
456,823
 
 
 
66,442
 
Less: accumulated amortization
 
 
(8,890
)
 
 
(18,500
)
 
 
(2,691
)
Net carrying value
 
 
447,933
 
 
 
438,323
 
 
 
63,751
 
 
Amortization expenses for the years ended December 31, 2016, 2017 and 2018 were RMB1,195, RMB5,256 and RMB9,610 (US$
1,398
), respectively.
 
As at December 31, 2017 and 2018, certain of the Group's prepaid land lease payments with a total net book value of RMB48,273 and RMB425,743 (US$
61,922
) were pledged to secure bank and other borrowings of RMB280,459 and RMB
501,789
 (US$
72,982
), respectively (note 17) and mandatorily redeemable noncontrolling interest of RMB396,281 
and RMB434,216 (US$63,154) (note 1), respectively.
 
The estimated annual amortization expenses for the prepaid land leases for each of the five succeeding years are as follows:
 
 
 
 
Amortization
 
 
 
 
RMB
 
 
US$
 
2019
 
 
 
9,462
 
 
 
1,376
 
2020
 
 
 
9,462
 
 
 
1,376
 
2021
 
 
 
9,462
 
 
 
1,376
 
2022
 
 
 
9,462
 
 
 
1,376
 
2023
 
 
 
9,462
 
 
 
1,376