I am Dr Singh,invited to the 16th World Congress of IUAES at Kunming, China, July 27-31, 2009. I am a British national and at the moment a visiting professor at JNU, New Delhi. Would the letter of invitation I have received be good enough along with other documents to obtain a visa to participate in the conference or do you need a letter from the conference organisers sent to you by email or fax in addition to the invitation sent to me? If you do need a communication from the conference organising committee, would an email be sufficient or faxing it is essential?