空姐的要求

Well, the age requirement is depends on the airline's policy.
To be considered for this role, you must have the Right of Abode in Hong Kong, be aged 18 or above, and be educated to HKCEE standard, or equivalent, with a pass (Syllabus B) or Level 2 in English. Proficiency in reading and speaking Mandarin, English and Cantonese is essential.
able to pass a medical assessment and meet a minimum arm-reach of 208cm.
If you have the english 文憑, it doesn't really matter. You can apply to CX / Dragon Air directly, the airline will provide you with training.