1. You can judge whether the dumplings are cooked by observing the color of the surface. The surface of cooked jiaozi is not pure white, but beige. If there is powdery substance on its surface, and it is pure white, it means that jiaozi is not ripe yet.

2. Tangyuan won't sink in the pot after it is cooked. Most jiaozi will float on the water when cooked. This is the best case to distinguish.

3. When the outside of the dumpling becomes slightly transparent. And it feels very elastic, indicating that jiaozi is ripe. When cooking jiaozi, avoid jiaozi sticking to the pan. Sticking to the bottom of the pot will paste and it is not easy to clean.

Tangyuan culture

Eating dumplings is a traditional custom of Han people, especially in Jiangnan. There is a folk saying that "eating glutinous rice balls is one year older". "Ningbo Tangyuan" is an essential food and a round dessert made of glutinous rice flour. "Circle" means "reunion" and "perfection". Eating glutinous rice balls during festivals symbolizes family harmony and auspiciousness, so it is also called "floating Zi Yuan".

On the 15th day of the first month of the Lantern Festival, Ningbo Tangyuan, as a kind of food, has a long history in China. This kind of food was originally called "Floating Zi Yuan", and later it was called "Tangyuan", also known as Yuanxiao.

"Tangyuan" contains sesame seeds, red bean paste, walnuts, nuts, jujube paste and so on. And wrapped in glutinous rice flour into a circle, you can be vegetarian and have different flavors. It can be boiled, fried and steamed, which means happy reunion.