Nach diesem Artikel ist solch eine Bearbeitung für normalsterbliche, speziell ausländische Sammler in Zukunft eher unwahrscheinlich:

http://www.smartplanet.com/blog/global-observer/beijings-space-post-office-to-put-mail-into-orbit/1056

Hier ein Hinweis für die Bezugsadresse für den Sonderstempel in Beijing:

Want to mail China’s space office? This is what to put on your envelope:

China Post Space Office
Beijing Aerospace Command and Control Center
Haidian District, 901001
Beijing, China

To obtain a space postmark in person for your mail, head to this address: Courtyard 1, Yongfeng Xiangxin Dian, Daidian District, Beijing 北京海淀区永丰乡辛店1号院, +86 10 6874 6825, 9:30 a.m.- 12 p.m., 2 p.m.- 4 p.m.

China Post Space Office charges RMB 1 on top of postage for issuing one space postmark.

Read more: China opens first 'space post office' | CNNGo.com http://www.cnngo.com/shanghai/play/greetings-universe-china-opens-first-space-post-office-009793#ixzz1h5cqro3c