What is the fine-grained topic of the following text: The 2 series of 4 miniature sheets with pictograms of 21 sports, included in the program of the Asian Games was issued by Turkmenpost in honor of the 5th Asian Games in Ashgabat on September 17, 2017. Only return the topic.
Issuance of Turkmenpost's miniature sheets for the 5th Asian Games.