The fluorine atom (floating dumpling) mentioned by the ancients refers to the delicacy of glutinous rice balls.

Specific explanation: glutinous rice balls.

What the ancients called "Fuyuanzi" refers to glutinous rice balls, which are also called Yuanxiao in some places. The glutinous rice balls float up after being cooked, so they are called Fuyuanzi.

It is mainly eaten during the Lantern Festival, so it is called Yuanxiao.

Some people say that those with fillings are called Yuanxiao, and those without fillings are called solid glutinous rice balls.

Knowledge expansion: The fifteenth day of the first month of the lunar calendar is the Lantern Festival, a traditional festival in my country. In Hubei, there is a saying that "the year is small and the month is half old", which means that the New Year is not as important as the Lantern Festival.

The Lantern Festival also marks the end of the Spring Festival.

There are quite a lot of customs during the Lantern Festival. The most well-known ones are appreciating lanterns, guessing lantern riddles, eating Lantern Festival, visiting temple fairs and other activities.