BOC Hong Kong : Letter and Request Form to Existing Registered Shareholders - (1) Notification on publication of Corporate Communications containing Notice of 2018 Annual General Meeting; and (2) Election of Language and Means of Receipt of Corporate Communications

(Incorporated in Hong Kong with limited liability)

€׵࠰ಥൗ̅ϓͭʘϞࠢʮ̡

€Stock Code 股份代號j2388

18 April 2018

Dear Registered Shareholder,

Letter to Existing Registered Shareholders - (1) Notification on publication of Corporate Communications containing Notice of 2018 Annual General Meeting; and (2) Election of Language and Means of Receipt of Corporate Communications

We are pleased to advise that the (i) 2017 Annual Report; (ii) Circular containing Notice of 2018 Annual General Meeting and Proposed General Mandates to Issue and Buy Back Shares; and (iii) Proxy Form for 2018 Annual General Meeting of BOC Hong Kong (Holdings) Limited ("BOCHK") have been prepared in English and Chinese. The English and Chinese versions of the aforesaid documents are now available in the "Investor Relations" section of BOCHK's website atwww.bochk.com and the website of Hong Kong Exchanges and Clearing Limited ("HKEx") at www.hkexnews.hk. The Annual General Meeting of BOCHK will be held on Wednesday, 27 June 2018 at 2:00 p.m. at Grand Ballroom, The Lobby Floor, Grand Hyatt Hong Kong, 1 Harbour Road, Wan Chai, Hong Kong.

Those Shareholders who (a) have received a printed copy of the 2017 Annual Report in either the English or Chinese language only and would like to receive a printed copy in the other language; or (b) have chosen (or are deemed to have consented) to access the Corporate Communications (as defined below) posted on BOCHK's website in lieu of receiving printed copies (the "Website Option") and would like to receive a printed copy now; or (c) wish to change their choice of language and means of receipt of all corporate communications issued or to be issued by BOCHK to Shareholders including but not limited to, annual reports and accounts, interim reports, notices of meetings, listing documents, circulars and proxy forms (collectively the "Corporate Communications") of BOCHK, please complete Part A and/or Part B of the Request Form overleaf and return it by post, using the mailing label at the bottom of the Request Form (no postage stamp is necessary if posted in Hong Kong; otherwise please affix an appropriate stamp), or by hand delivery to BOCHK's share registrar, Computershare Hong Kong Investor Services Limited ("BOCHK's Registrar") at 17M Floor, Hopewell Centre, 183 Queen's Road East, Wan Chai, Hong Kong. You may also send a scanned copy of the Request Form duly completed and signed to BOCHK's Registrar via email tobochk.ecom@computershare.com.hk. The Request Form may also be downloaded from BOCHK's website at www.bochk.com or HKEx's website atwww.hkexnews.hk.

You are entitled at any time by reasonable notice in writing to BOCHK's Registrar to change your choice of language and means of receiving Corporate Communications. Further, if you have chosen (or are deemed to have consented) to access the Corporate Communications posted on BOCHK's website and have any difficulty in receiving or gaining access to the relevant documents, for any reason, BOCHK's Registrar will promptly upon your notice send the printed form of the same to you free of charge. The aforesaid notice should contain your name, address, contact telephone number and relevant request and be sent to BOCHK's Registrar at the address as mentioned above or via email tobochk.ecom@computershare.com.hk.

Please note that printed English and Chinese versions of Corporate Communications of BOCHK are and will be available from BOCHK or BOCHK's Registrar upon request, and both language versions are or will be available on BOCHK's website atwww.bochk.com and HKEx's website atwww.hkexnews.hk.

You are encouraged to access the Corporate Communications posted on BOCHK's website in lieu of receiving printed copies, which helps to reduce the impact on the environment and, we believe, is a more convenient and prompt method of communication with Shareholders.

If you have any queries relating to this letter, please do not hesitate to call BOCHK's enquiry hotline at (852) 2846 2700 during business hours from 9:00 a.m. to 6:00 p.m. from Monday to Friday, excluding Hong Kong public holidays.

Yours faithfully,

For and on behalf of

BOC Hong Kong (Holdings) Limited

Luo Nan

Company Secretary

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(2)፯኿ϗ՟ʮ̡ஷৃ˖΁ʘႧԊو͉ʿϗ՟˙ό ʕვ࠰ಥ€છٰϞࠢʮ̡€˜ʕვ࠰ಥ™ (i)2017 ϋజi (ii) ༱Ϟ 2018 ϋٰ؇඄ϋɽึஷѓձ೯БʿΫᒅٰ΅ɓছબᛆܔᙄʘஷՌiʿ (iii)2018 ϋٰ ؇඄ϋɽึ˾ڌ։΂ڌࣸ௪Ϟʕ e ߵ˖و fɪࠑ˖΁ٙʕeߵ˖وତʊɪ༱׵ʕვ࠰ಥၣ१ (www.bochk.com) ˜ҳ༟٫ᗫڷ™ɓືʿ࠰ಥʹ׸ ʿഐၑהϞࠢʮ̡€˜࠰ಥʹ׸ה™ၣ१(www.hkexnews.hk) fʕვ࠰ಥࠈ׵2018ϋ6˜27˚€݋ಂɧɨʹ2͍ࣛ৿ࢭ࠰ಥᝄ˺ಥᝄ༸1໮࠰ಥёࣀ ৢֳɽੀᅽᄴ࢖ึɽᓿੀᑘБٰ؇඄ϋɽึf ٰ؇ν(a)සϗ՟2017ϋజٙߵ˖אʕ˖وdШ૧ϗ՟̤ɓႧԊٙΙՏ͉iא(b)ʊ፯኿€א஗ൖމΝจɪၣቡᚎ೮༱ίʕვ࠰ಥၣ१ٙʮ̡ஷৃ˖΁€່֛ Ԉɨ˖˸˾ಁϗ՟ՉΙՏ͉€˜ၣɪቡᚎ˙ό™dШତ૧ϗ՟ՉΙՏ͉iא(c)૧һҷϗ՟ʕვ࠰ಥʊאਗ਼ึΣٰ؇̊೯ٙʮ̡ஷৃ˖΁ܼ̍€Шʔࠢ׵ϋజ ʿሪͦeʕಂజѓeึᙄஷѓeɪ̹˖΁eஷՌʿ˾ڌ։΂ڌࣸ€Υ၈˜ʮ̡ஷৃ˖΁™ٙႧԊو͉ʿϗ՟˙όdሗ෬ѼߠࠦٙࠅӋڌࣸٙ͠௅ʿŊאɔ௅d ್ܝԴ͜ࠅӋڌֵࣸ௅ᎇڝٙඉ੔ᅺᜀਗ਼ࠅӋڌࣸ੔Ϋ€νί࠰ಥҳ੔dˡ඲൨ɪඉୃiщۆdሗ൨ɪቇ຅ٙඉୃא˸ਖ਼ɛʹ˹З׵࠰ಥᝄ˺ެΧɽ༸؇ 183໮Υձʕː17Mᅽٙʕვ࠰ಥٰ΅ཀ˒೮াஈ࠰ಥʕ̯ᗇՎ೮াϞࠢʮ̡€˜ʕვ࠰ಥཀ˒ஈ™fტɨ͵̙Ҫʊ෬Ѽʿᖦ໇ٙࠅӋڌࣸٙધ౜ਓ͉˸ཥඉ ˙όෂ৔Їbochk.ecom@computershare.com.hkf༈ࠅӋڌࣸ͵̙׵ʕვ࠰ಥၣ१(www.bochk.com)א࠰ಥʹ׸הၣ१(www.hkexnews.hk)ʫɨ༱f

ტɨϞᛆᎇࣛΣʕვ࠰ಥཀ˒ஈ೯̈ΥଣࣛගࣣٙࠦஷٝdࠅӋһҷה፯኿ϗ՟ʮ̡ஷৃ˖΁ٙႧԊو͉ʿϗ՟˙όfϤ̮dࡊტɨʊ፯኿€א஗ൖމΝ จɪၣቡᚎ೮༱ίʕვ࠰ಥၣ१ٙʮ̡ஷৃ˖΁dೌሞΪ΂Оଣ͟˸ߧίϗ՟אቡᚎϞᗫ˖΁ࣛ༾ՑѢᗭdʕვ࠰ಥཀ˒ஈਗ਼׵ટՑტɨஷٝܝdͭуΣ ტɨе൬೯৔༈ഃ˖΁ٙΙՏ͉fۃࠑஷٝ඲ܼ̍ტɨ֑ٙΤeήѧeᑌഖཥ༑໮ᇁʿ޴ᗫࠅӋԨԱ๫ɪࠑήѧ৔ʹʕვ࠰ಥཀ˒ஈא˸ཥඉ˙όෂ৔Їbochk.ecom@computershare.com.hkf

ʕვ࠰ಥʿʕვ࠰ಥཀ˒ஈ͵௪Ϟʕვ࠰ಥٙʮ̡ஷৃ˖΁ٙʕeߵ˖وΙՏ͉d˸Զ॰՟i༈ഃʮ̡ஷৃ˖΁ٙʕeߵ˖Շ၇ႧԊو͉ʊאਗ਼ึ೮༱ί ʕვ࠰ಥၣ१(www.bochk.com)ʿ࠰ಥʹ׸הၣ१(www.hkexnews.hk)d˸Զቡᚎf

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Ϥߧ

΢З೮াٰ؇ ˾ڌ ʕვ࠰ಥ€છٰϞࠢʮ̡ ʮ̡।ࣣ ᖯ฻ ᔫ઼

2018ϋ4˜18˚

Unless otherwise stated, capitalised terms used herein shall have the same meanings as those defined in the letter of BOCHK to its Existing Registered Shareholders dated 18 April 2018.

ৰ˖່̤Ϟ஝֛̮d͉ࠅӋڌࣸʕה͜൚คՈϞ˚ಂމ2018ϋ4˜18˚ʕვ࠰ಥߧՉତϞ೮াٰ؇ٙՌ΁ʕהޢ֛ٙ଄່f

Part A - To receive a printed version of the 2017 Annual Report of BOCHK ͠௅ - ϗ՟ʕვ࠰ಥ2017ϋజٙΙՏ͉

(Please tick ONLY ONE boxNote 1€) ሗ˸˜™໮፯኿ɓධڝൗ1 Please send me/us a printed version of the 2017 Annual Report in: ሗਗ਼2017ϋజٙ˸ɨΙՏ͉੔৔ʚ͉ɛŊшഃj

printed English version only; or සߵ˖ΙՏ͉iא

printed Chinese version only; or සʕ˖ΙՏ͉iא

both English and Chinese printed versions.

ߵ˖ʿʕ˖ΙՏ͉f

Part B - To change the choice of language and means of receipt of future Corporate Communications of BOCHK ɔ௅ - һҷה፯኿ϗ՟ʕვ࠰ಥ˚ܝ̊೯ٙʮ̡ஷৃ˖΁ٙႧԊو͉ʿϗ՟˙ό

I/We would like to receive future Corporate Communications of BOCHK in the manner as indicated below: ͉ɛŊшഃҎૐ˸ɨΐ˙όϗ՟ʕვ࠰ಥ˚ܝ̊೯ٙʮ̡ஷৃ˖΁j

(Please tick ONLY ONE boxNote 1€) ሗ˸˜™໮፯኿ɓධڝൗ1

to access the Corporate Communications posted on BOCHK's website atwww.bochk.com in lieu of receiving printed copies (the "Website Option"), and to receive a notification of the publication of the Corporate Communications on the website of BOCHK; or ˸ቡᚎ೮༱׵ʕვ࠰ಥၣ१€www.bochk.comٙʮ̡ஷৃ˖΁d˸˾ಁϗ՟ΙՏ͉€˜ၣɪቡᚎ˙ό™dԨϗ՟Ϟᗫʮ̡ஷৃ˖΁ʊ׵ʕვ ࠰ಥၣ१ɪ̊೯ٙஷٝiא

to receive the printed English version only; or ̥ϗ՟ߵ˖ΙՏ͉iא

to receive the printed Chinese version only; or ̥ϗ՟ʕ˖ΙՏ͉iא

to receive both English and Chinese versions.

ϗ՟ߵ˖ʿʕ˖ΙՏ͉f

• 1. Please tick only one box under each of Part A and Part B on this form. Any Request Form with more than one box ticked under each of Part A and Part B, with no box ticked, with no signature or otherwise incorrectly completed will be void.

  ί͉ࠅӋڌࣸٙ͠௅ʿɔ௅̥̙΢І፯኿ɓධfνί͉ࠅӋڌࣸٙ͠௅ʿɔ௅΢ІЪ̈൴ཀɓධ፯኿eא͊ϞЪ̈፯኿eא͊Ϟᖦ໇eאίՉ˼˙ࠦ෬ᄳʔ͍ᆽdۆ͉ࠅ Ӌڌࣸਗ਼ึЪᄻf

• 2. If your shares are held in joint names, all joint shareholders OR the joint shareholder whose name stands first on the Register of Members of BOCHK in respect of the joint holding should sign on this Request Form in order to be valid.

  νტɨٰٙ΅˸ᑌΤܵϞdۆ͉ࠅӋڌࣸ඲͟הϞᑌΤٰ؇א༈Τ׵ʕვ࠰ಥٰ؇Τ̅ɪఱᑌΤܵϞٰ΅Չ֑ΤЗΐ࠯ЗٙᑌΤٰ؇ᖦ໇d˙މϞࣖf

• 3. Please return this Request Form by cutting the mailing label at the bottom of this form and stick it on an envelope according to the indications and mail this Request Form to BOCHK's Registrar, Computershare Hong Kong Investor Services Limited.

  ሗܸܲͪਗ਼͉ࠅӋڌֵࣸ௅ٙඉ੔ᅺᜀ਒൨׵ڦ܆ɪdԨ੔Ϋʕვ࠰ಥٰ΅ཀ˒೮াஈ࠰ಥʕ̯ᗇՎ೮াϞࠢʮ̡f

  BOCH-18042018-1(0)

• 4. For the avoidance of doubt, we do not accept any other instructions given on this Request Form.

  މеπဲd΂Оί͉ࠅӋڌࣸɪٙᕘ̮ܸͪdʕვ࠰ಥਗ਼ʔʚஈଣf