Kids Bucket Hats,Frog Fisherman Hat,Summer Outdoor Sun Protection Cap,Women's Bucket Hats Hun Yuan Ya Lian Wan Jia Dian Zi Shang Wu You Xian Ze Ren Gong Si , https://www.ylwjastragalus.comThe second edition of Su Shao's Fine Art "Will You Design Stamps" PPT Function: Stamps are issued by the National Post Office to affix to the mail to show that the postage has been paid. The people, things, and things shown on the stamps often reflect the political, economic, cultural, and scientific aspects of a country. Therefore, stamps are called "national business cards" and have high artistic value and collection value.