There was a Chinese sequel to the Oz books

When L. Frank Baum died in 1919, his Oz novels were continued by Ruth Plumly Thompson and illustrated by Baum's illustrator John R. Neill. Their very first collaboration, The Royal Book of Oz (1921) is set in China and there is plenty of imperialist yellow peril thinking going on here. It is fair to say that Baum had better instincts, but my point here is that Baum's circle recognized that much of his inspiration came from his reading about events in China, and Thompson drew on this.

Thompson calls her creation The Silver Island, and there are some Japanese and Indian and Alice in Wonderland influences, but it's China all right. The Scarecrow discovers he is the reincarnation of the country's long lost former emperor, and the current emperor, Chang Wang Woe, has been turned into a crocus flower. There are officials called Grand Chew Chew and Chief Chow Chow. The text is replete with pigtails and kimonos, constant bowing and obsequious courtiers, an imperial army, and - oh dear - the locals eat minced cats and the Scarecrow is disgusted.

Here are a couple more of Neill's illustrations of the Scarecrow to make the point: it's racist fare.

But the Silver Islanders themselves were too stupid to appreciate this beauty. - from Chapter VIII: The Scarecrow Studies the Silver Island

Why did Thompson and Neill go this route? Baum would never have made this mistake. Unfortunately, they persisted: The Silver Princess in Oz (1938) may be much later, but it is just as bad, in that it features Black African slaves with turbans and scimitars and...