A philatelist demonstrates a "mobile connection" themed commemorative stamp of "Internet Life", a special stamp set issued by China Post to mark the 20th anniversary of China's internet era, at a postal office in Suzhou, East China's Jiangsu province, April 20, 2014. China officially gained internet access on April 20, 1994. Within two decades, internet has played a vital part of the country's everyday life. The special stamp set contains four commemorative stamps with their respective themes -- "online communication", "e-commerce", "mobile connection" and "cloud computing". [Photo/Xinhua]

Collector opens coupon museum 

Postal museum showcases history