Dr. Michael G. Gavrilov, Founding Chairman and Coordinator of the Asian-Pacific Astronomy Olympiad (APAO) ISSP of Russ. Acad. Sci., Academician Ossipyan street 2, 142432 Chernogolovka, Moscow region, Russia. URL: http://www.issp.ac.ru/iao/apao/2018/ e-mail: gavrilov@issp.ac.ru fax: + 7-(496-52)-28-160