"long" is the pinyin for Mandarin word for dragon. It has the second tone which is a rising tone.To correctly pronounce the word you should use a vowel sound that is more similar to that from the...
我 "Wo" This is pronounced in the third tone, start fairly low, fall a little, then rise, like a hockey stick. The word sounds approximately like the English "war", but with no "r" sound at the end.
Have your teeth meet and have your tongue touch the place where both upper and bottom teeth meet and make a "Sssss" sound (the kind snakes make).Then "an" is like "yawn" without the "y".See below...