According to Wiki : "Dumplings are one of the major foods eaten during the Chinese New Year and year round in the northern provinces. Traditionally, families get together to make jiaozi for the Chinese New Year. In rural areas, the choicest livestock is slaughtered, the meat ground and wrapped into dumplings, and frozen outside with the help of the freezing weather. Then they are boiled and served for the Chinese New Year feast. Dumplings with sweet, rather than savoury fillings are also popular as a Chinese New Year treat."
I never knew jiaozi existed until i visited Beijing and had a lunch of jiaozi - boiled, steamed, fried. According to the guide, this restaurant serve the best jiaozi, but i did not like them, the skin was too doughy.
2 cups chopped napa cabbage