The Shanghai-Nanking Railway (Huning Railway) was established in the late 19th century during the Western occupation of Qing China, and was built, operated, and supplied by the British. As the main line is fairly level, it was one of the last railways to use "singles" on passenger trains. In 1910, it received a class of 4-2-2 engines from Kerr, Stuart & Co. (Stoke-on-Trent, Staffordshire, England) designated Nos. 1181-1184. Their livery of bright yellow lined with gold and purple, and their regular assignment to lightweight express passenger and mail trains, led to the Chinese drivers nicknaming them the imperial mail engines. Compared to the 4-4-0 passenger engines, the singles were much more economical. Their final fate remains unknown, though it is reasonable to assume they were retired by the mid-20th century and scrapped, as increasing Chinese industrialization and urbanization pushed train weights beyond the limits of the imperial mail engines. This painting of an imperial mail engine by Clifford and Wendy Meadway is featured in O.S. Nock's history book Railways at the Turn of the Century, 1895-1905.
LOOK AT DE SHINY SHINY
Not something you see every day is it?
That's one of a very rare group of Singles fitted with full cabs and cowcatchers!
And probably the newest member of that group; all the others I can think of are a good deal older, such as Cumberland Valley 2-2-2 Pioneer.