NOTES TO THE CONSOLIDATED FINANCIAL  STATEMENTS  (RMB AND US$ AMOUNTS EXPRESSED IN THOUSANDS, EXCEPT PER SHARE DATA)  29.  Commitments and contingencies Operating lease commitments - Group as lessee The Group has entered into commercial leases on certain motor vehicles, office space and items of machinery. These  leases have an average life of between three and five years with no renewal option included in the contracts. There are  no restrictions placed upon the Group by entering into these leases. Future minimum rentals payable under non-cancellable operating leases as at December 31 are as follows: The minimum lease payments recognized as an expense in the period ended December 31, 2011, 2012 and 2013  amounted to Rmb 43,806, Rmb 46,817 and Rmb 51,115 (US$8,352). The Group has leased out some of its assets, including surplus office and manufacturing buildings. All leases include  a clause to enable upward revision of the rental charge on an annual basis according to prevailing market conditions. Future minimum rentals receivable under non-cancellable operating leases as at December 31 are as follows: Operating lease commitments - Group as lessor 31.12.2012 31.12.2013 31.12.2013 Rmb’000 Rmb’000 US$’000 Within one year - With related parties 998 4,949 809 - With third parties 10,973 8,902 1,455 After one year but not more than five years - With related parties 170 1,524 249 - With third parties 5,602 6,282 1,026 17,743 21,657 3,539 31.12.2012 31.12.2013 31.12.2013 Rmb’000 Rmb’000 US$’000 Within one year - With related parties 1,648 1,296 212 - With third parties 2,435 2,163 353 After one year but not more than five years - With related parties 479 548 90 - With third parties 8,350 8,014 1,309 More than five years - With related parties 2,100 2,000 327 - With third parties 22,261 21,840 3,569 37,273 35,861 5,860 China Yuchai International Limited | Annual Report 2013 109