Beijing, October 9 (Youth.cn) - What colors make people feel hopeful? Green uniform of servicemen, blue uniform of policemen, orange uniform of firemen... Beside these, a profession may also deliver hopes to people - postmen. World Post Day falls on October 9th. In China, postmen impress people with their dedication to work. They have delivered millions of mails with emotions and significance to the correct places and the correct persons. Airlines, railways, shipping lanes, expressways... multiple transport networks facilitate the deliverance of mails. But we still need 900 thousands postmen to run for the "last kilometer". Photo/VCG