中華人民共和國於1958年通過漢語拼音方案後，郵政式拼音作爲中國大陸地名嘅音譯標準仍然在國際上通行，直至聯合國於1977年起正式改用漢語拼音拼寫中國大陸地名。緃然如此，中國歷史較久嘅機場所用嘅IATA代碼仍然係以郵政式拼音為基礎，如北京首都國際機場嘅IATA代碼PEK。
After the People's Republic of China adopted the Hanyu Pinyin scheme in 1958, postal pinyin as the transliteration standard for geographical names in Chinese mainland was still in use internationally until the United Nations officially switched to Hanyu Pinyin to spell Chinese mainland geographical names in 1977. Suddenly, the IATA code used by China's older airports is still based on postal pinyin, such as the IATA code PEK at Beijing Capital International Airport.