这是一枚寄自甘肃山丹的实寄封,贴票计14450圆,销甘肃山丹1947年5月28日全点线三格中文邮戳,航空寄往美国。信件6月7日到达上海,正巧赶上美国泛美航空公司首次开辟中美直达航邮,封正面加盖上海的首航纪念邮戳(图1),登上自上海返航班机,寄往美国。中美直达航邮始自1937年的“中国飞剪”航线,1941年12月7日日本偷袭珍珠港,太平洋战争爆发,此航线停航。“二战”胜 This is a real mails sent from Gansu Shandan posted votes 14450 round, sales Gansu Shandan May 28, 1947 the whole point of three grid Chinese postmark, airmail to the United States. When the letter arrived in Shanghai on June 7, it coincided with the first flight of the U.S. Pan American Airlines to open a direct postal service between China and the United States. The postage stamp was stamped with a commemorative postmark on the maiden flight of Shanghai (Figure 1). It was posted on a return flight to Shanghai from Shanghai. China and the United States direct mail and airmail since 1937 “China Flying Shelf ” route, December 7, 1941 Japan attacked Pearl Harbor, the Pacific War broke out, this route suspended. “World War II” wins