Most foreigners who want to visit Korea just for a short-term tour or transit are permitted to enter Korea with no visa according to the principles of reciprocity or priority of national interest with a tourist/transit visa status (B-2, 30 days). Visit folowing link for further information about visa rules:
Letter of Invitation (for Visa Application)
Participants requiring an official Letter of Invitation in order to obtain a visa and authorization to attend HSI2017 should contact the Secretariat no later than June 1, 2017. This letter is NOT a commitment on the part of HSI2017 Organizing Committee to provide financial assistance to any participant or accompanying persons. Expenses incurred are the sole responsibility of the participant.