Wang Tun-jen takes himself as an example. In order to specially collect foreign stamps, he studied foreign languages, immersed himself in foreign geography, and even made a gaggle of pen pals for the stamps. These were all "added bonuses" besides the stamps themselves.
王敦仁以自己為例，為了蒐集外國的相關郵票，他特地去學外文、研究外國地理，甚至為交換郵票而廣交外國筆友，這些都是除了郵票之外的「附加收穫」。