What are the specialties and specialties of Jinghai?

Because my university is studying in Hebei province, and my friends are all from different places, I just want to bring them local products. When I went to school, I brought old vinegar (but there are some in the supermarket opposite our school, which is sad), golden jujube (there are many dates in Jinghai, and I chose the small purple one, but the students all reported little but very sweet), roasted seeds and nuts in Wangkou (the stall at the school gate also sells roasted seeds and nuts in Wangkou, which is sad), and winter vegetables in Tianjin (there are small jars, and now supermarkets and department stores in Wei Bei seem to be ternary, which is very sad. I went to the guest's house and brought Tianjin winter vegetables, Cantonese sausage (the so-called Zhongwang sausage in Yutai Chunjulong and other hotels belongs to the Cantonese family in the county town, and I personally feel that it is more delicious than Zhongwang sausage), and I also brought Gynostemma pentaphyllum wine (it seems that it is said to be the earliest health wine in Tianjin? I bought a red porcelain bottle from 68 yuan, which is very beautiful. According to the drinker, it's delicious, too. I bought it again in the New Year. )