Ningbo Tianyi Plaza is a large-scale commercial complex located in Haishu District, Ningbo City, Zhejiang Province. There are many restaurants in the square, including jiaozi's. Here are some jiaozi stores that may have a good reputation:

1. Ajisen Lamian Noodles: Ajisen Lamian Noodles is a famous Japanese Lamian Noodles brand, and it also has a branch in Ningbo Tianyi Square. Besides Lamian Noodles, they also offer various flavors of jiaozi, such as dumplings and fried dumplings.

2. KFC: KFC is a world-famous fast food brand, and it also has a branch in Tianyi Square in Ningbo. They serve all kinds of fast food, including jiaozi.

3. McDonald's: McDonald's is a world-famous fast food brand, and it also has a branch in Tianyi Square in Ningbo. They serve all kinds of fast food, including jiaozi.

4. Other snack bars: There are many snack bars in Tianyi Square in Ningbo, and jiaozi may also be provided. You can find a snack bar with good reputation in the square and try their jiaozi.

These are some jiaozi shops that may have a good reputation, but the taste and quality vary from person to person. I suggest you choose according to your own tastes and preferences. At the same time, you can also pay attention to the local food evaluation and word of mouth, and choose a jiaozi store that is more suitable for you.