i am a nigeria living in spain, i hold spanish permanent stay resident, i have my working contract here in Spain,my nigeria passport have Belgium visa issued by Belguim Embassy from Nigeria, i have my family here living with me in spain too, i want visit china by Fabuary next year during my working vacation from Spain, what do i need to present and will i buy ticket, hotel reservation first before applies for visa, how long will it take for china Ambassy to issue me visa in madrid. why China Embassy in Madrid never answer calls from public