How do you Send a fax to hong kong?

To send fax documents you can use fax machine or internet fax service. You can choose which you think is more convenient and cost effective for you. The advantage of having the internet fax is that you can access your fax documents anywhere you may be as long as you are connected to the internet.
The international country code for Hong Kong is 852.

To dial this from the US or Canada, you would need to dial 011-852-fax number

(011 is to dial internationally)

To dial this from the UK or Germany, you would need to dial 00-852-fax number (00 is to dial internationally)

Drop any + or 0 from the start of the number.