

I am Vietnamese citizen, working and living currently in Sweden.
I would like to have a vacation for 5 or 7 days in HK but when I look up for tourist entry permit application from HK immigration office website, they require sponsor invitation in HK.
Do I need to have this invitation for my tourist purpose, because I am solo traveller and I do not have any friend or sponsor HK?
I called China Embassy in Sweden and they told me that they have no permission to decide about HK entry permit issue, so it's better to apply directly to immigration office in HK by post.
I looked through the process of application but I do not know how to pay for visa fee because there is no information about payment process and no permission to put cash in application letter envelope if I intend to apply by post and send to immigration office in HK.
If you have any idea about my case, please give me some advices!
Thank you very much!
Best,
Ken