There are two ways to get Vietnam Visa from Hong Kong as follows:
Processing time: 2 days (normal) for 1-month visa
Processing fee: $300HK
Urgent type: get after 15 mins (only for 14-day visa); Costs an extra $500HK
Contact Vietnam Consulate in Hong Kong:
Address: 15/F, Great Smart Tower, 230 Wan Chai Road
Wan Chai, Hongkong
Tel: (852) 2591 4517 / 2591 4510
Fax: (852) 2591 4524 / 2591-4539
How to get there? You go to Wan Chai road, you will see Great Smart Tower Building. Enter from Canal Road East and it is not far from there.
2. Get Vietnam Visa on arrival via online service
The considered quicker and easier way to get Visa to Vietnam from Hong Kong is to apply online for a Visa on Arrival at http://www.vietnam-visa.com. However, this method is applicable to air travel only. Our service costs is only 25$ US for one application.