[CUSIP No. 602675100 13G Page 11 of 12 Joint Filing Agreement October 21, 2010 This Agreement may be executed in multiple counterparts, each of which shall constitute an original, one and the same instrument. Commonwealth Bank of Australia John Damien Hatton Company Secretary Colonial Holding Company Limited John Damien Hatton Director Commonwealth Insurance Holdings Limited John Damien Hatton Director Colonial] [CUSIP No. 602675100 13G Page 12 of 12 Item 7 Information The securities being reported on by the reporting persons herein as parent holding companies are owned, or may be deemed to be beneficially owned as follows: Company Type of Company First State Investments (Hong Kong) Limited IA (HK registered) First State Investments International Ltd. IA (US registered) First State]

[CUSIP No. 602675100 13G Page 11 of 12 Joint Filing Agreement October 21, 2010 This Agreement may be executed in multiple counterparts, each of which shall constitute an original, one and the same instrument. Commonwealth Bank of Australia Colonial Holding Company Limited Commonwealth Insurance Holdings Limited] [CUSIP No. 602675100 13G Page 12 of 12 Item 7 Information The securities being reported on by the reporting persons herein as parent holding companies are owned, or may be deemed to be beneficially owned as follows: Company Type of Company First State Investments (Hong Kong) Limited IA (HK registered) First State Investments International Ltd. IA (US registered) First State]

[CUSIP No. 602675100 13G Page 2 of 12 1 NAME OF REPORTING PERSON 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A o (a) (b) 3 SEC USE ONLY 4 CITIZENSHIP OR PLACE OF ORGANIZATION Australianpital Territory,mmonwealth of Australia 5 SOLE VOTING POWER NUMBER OF 0 SHARES] [CUSIP No. 602675100 13G Page 11 of 12 Joint Filingreement October21, 2010 Thisreement may be executed in multipleunterparts, each of which shallnstitute an original, one and theme instrument.mmonwealth Bank of Australia Johnmien Hattonmpany Secretarylonialmpany Limited Johnmien Hatton Directormmonwealth Insurances Limited] [CUSIP No. 602675100 13G Page 12 of 12 Item7 Information The securities being reported on by the reporting persons herein parentmpanies are owned, or may be deemed to be beneficially owned follows:mpany Type ofmpany First State Investments (Hong Kong) Limited IA (HK registered) First State Investments International]

[CUSIP No. 602675100 13G Page 2 of 12 1 NAME OF REPORTING PERSON 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A o (a) (b) 3 SEC USE ONLY 4 CITIZENSHIP OR PLACE OF ORGANIZATION Australianpital Territory,mmonwealth of Australia 5 SOLE VOTING POWER NUMBER OF 0 SHARES] [CUSIP No. 602675100 13G Page 11 of 12 Joint Filingreement October21, 2010 Thisreement may be executed in multipleunterparts, each of which shallnstitute an original, one and theme instrument.mmonwealth Bank of Australialonialmpany Limitedmmonwealth Insurances Limitedlonial First State Limited EX-99.1] [CUSIP No. 602675100 13G Page 12 of 12 Item7 Information The securities being reported on by the reporting persons herein parentmpanies are owned, or may be deemed to be beneficially owned follows:mpany Type ofmpany First State Investments (Hong Kong) Limited IA (HK registered) First State Investments International]