Hkg Visa for Goining ship at Hkg port

Dear Sir, Good Day

Pls note I am Ship Captain and want to join my ship at Hkg. Getting Seaman visa.
I have grantee letter from my agency at Hkg and my company supporting documents.
Pls let me know how long take to get my hkg entry permit. And is Sunday can I come to embassy in Tehran and apply for it.