In Dezhou, there’s Chinese-Muslim village, many of whose inhabitants trace their roots to the Sultan of Sulu.
They have concrete proof of that connection: the tomb of the 13th century Sultan of Sulu Paduka Pahala at the Decheng district of Dezhou.
The only mausoleum of a “foreign king” in China, it is the only burial place with a village in charge of guarding it.