Who knows the origin of Putian?

Putian-Putian, because there has been a flood, three points of water have been removed. There is also a legend that there was an explosion in Putian because the old man was making an alchemy, and Dan fell into the sea, and the cattle in Tuodi were scalded, which caused geological changes. Originally called Futian, it was wrong to report it to the court and became Putian.