Chinese postal romanization
Postal romanization was a system of transliterating place names in China developed by postal authorities in the late 19th and early 20th centuries. For many cities, the corresponding postal romanization was the most common English-language form of the city's name from the 1890s until the 1980s, when postal romanization was replaced by pinyin, but the system remained in place in Taiwan until 2002.
Source: Wikipedia — Chinese postal romanization (CC BY-SA 4.0)