Which is the correct spelling, Jiudong or Jiudong?

It's cold for nine days, and "Nine Days" is also called "Winter 99", which is a solar term for Han people in winter. "Nine" is counted from the annual "Winter Solstice", and every nine days is a unit. There are many customs of "counting nine", among which "Jiujiu Song" is the most extensive and has a long history. In the traditional culture of Han nationality, nine is the extreme number, which is the largest, largest and longest concept. Nine nines is eighty-one, which is the "maximum" number. Ancient Han people thought that September 8 1 day must be the spring after the winter solstice. The "Jiujiu Song" in the middle and lower reaches of the Yellow River is: 1929 without a gun; Walking on the ice in 3949; 5969 see willows along the river; Seven or nine talks, eight or nine geese come; 1999 and 1999, cattle are being farmed everywhere.