My real posted First Day Cover (FDC), aerogramme and postcard collection.
Oct 7, 2015
China FDC on "50th Anniversary of the Total Synthesis of Crystalline Bovine Insulin"
First Day Cover 首日封 Sobrescrito de 1.º Dia
China 50th Anniversary of the Total Synthesis of Crystalline Bovine Insulin
Date of Issue : 17 September 2015
In 1965, the Institute of Biochemistry under the Chinese Academy of Sciences (CAS) joined hands with Peking University and the Institute of Organic Chemistry under CAS to complete the total synthesis of crystalline bovine insulin. This was the first synthesized protein with full biological activity and identical chemical structure to native insulin molecules.
Hi Everyone !
I am Tommy Ying from Hong Kong. Thanks to all my good friends, I am now having real posted FDC or postcards from some 140 countries around the World. If you want to swap real posted FDC or aerogramme or stamped postcards with me, feel free to email me at : firstname.lastname@example.org