You can't the visa in the airport, Lebanonese need a visa to visit Hong Kong, please apply for Hong Kong visa before departure,
The following documents are required:

1. A completed Visa Application Form-- ID(E)1003 --, which should be typed and signed by the applicant. Visitors for tourism and business are required to submit page A, page A to be continued, and page B, C, D, L.

2. A copy (A-4 size) of the passport and U.A.E. residence visa, both of which should be valid for more than six months and a photograph as in the passport.

3. An employment/no-objection letter from the company, which clarifies the applicant's full name, position, nationality, passport number and the purpose of the visit, and a copy of the trade license, if self-employed.

4. An invitation letter from the sponsor in Hong Kong (for business visit).

5. Detailed schedule, confirmed hotel reservation and round air ticket booking (for tourism).

6. Original personal bank statement for the last three months.

In normal circumstances, processing of an application for a visit visa can be finalized within four weeks after the receipt of all necessary documents.

To shorten processing time, application forms and supporting documents can be sent by Fax to 00852-2824 1133 in the first instance. However, the original copy of the duly completed application form and the photographs required should be sent immediately to the Hong Kong Immigration by Airmail. A visa will be issued only upon receipt of an original, properly completed visa application form.

Direct Postal Application can be mailed to the:

Hong Kong Immigration Department, Employment and Visit Visas Section,

24/F Immigration Tower, 7 Gloucester Road, Wanchai Hong Kong.

Enquiries concerning the application procedure can be made to Hong Kong Immigration department at 00852-2824 6111, or by Fax 852-2877 7711 or

through e-mail: immd.gov.hk|enquiry