Beijing is in the Dongba time zone, and Vienna, the capital of Austria, is in sunrise time zone. The difference between the two places is seven hours. Therefore, if it's 10 in Beijing, it's three o'clock in Austria. World time is calculated by time zone. The earth is divided into 24 equal parts every week, and each equal part is a time zone. Such a time zone is longitude 15 degrees. 24 hours a day, so a time zone is one hour apart. Longitude zero, that is, the time zone through which the meridian passes, is the east (west) time zone. The longitude of Beijing is east longitude 1 16 degrees 2 1 min, that is, Dongba time zone, 8×15 = 120, so the time zone of Dongba time zone is east longitude120 degrees, which is Beijing time. The longitude of Vienna, the capital of Austria, is east longitude 16 degrees 22 minutes, that is, sunrise time zone,1x 15 =15, so the time zone in sunrise time zone is east longitude15 degrees, that is, Austrian time.