Core Viewpoint - The event "What Makes China: Harmony and Coexistence" highlights the historical significance of the Dalu Post Office in Tianjin, showcasing its role in the development of modern Chinese postal services through various cultural and creative initiatives [1] Group 1: Historical Significance - The Dalu Post Office is recognized as the birthplace of modern Chinese postal services and the "Dalu Stamp" [1] - The first official set of Chinese postage stamps, known as the "Customs First Group Cloud Dragon Stamps," was issued in Tianjin in 1878, marking a pivotal moment in postal history [1] Group 2: Cultural and Creative Development - The Dalu Post Office has developed a series of cultural and creative products, including postcards and refrigerator magnets, to integrate historical symbols into modern daily life [1] - Visitors can engage in hands-on experiences, such as printing the Dalu Stamp, transforming postal heritage from mere historical records into tangible memories [1]