how do I apply for hongkong visa? I'm a nepali living in spain with a spainish resident document

You can apply for Hong Kong visa through China embassy / consulate in Spain. The requirements are:
1. your passport and photocopies of its data pages
2. one passport photo
3. Spanish residence document and its copy
4. completed Hong Kong visit visa application form ID 1003A
5. The two-way air tickets and hotel booking

hello sir this is chhongba again,
thank you for your information about my visa for hongkong,well how long i have to waite for visa,can i get same day when i aply or i must have to waite there few days ? because it is so far from here,
and my tiket is madrid spain to hong kong, after one week hong kong to nepal and after 16days nepal to madrid spain,is ok so ? or any probolem for visa ? thank you

It usually takes 4 weeks to process a Hong Kong visa. Since you'll only enter Hong Kong once, so the visa is fine for you.

Thanks Jonash!!!