20-30 roots. According to Dianping.com, a pound of Youzanzi in Ningbo costs about 15 yuan, which is about 20-30 pieces. Youzanzi originated in Zhejiang and was protected and promoted in Ningbo. It is a traditional delicacy in Ningbo. Youzanzi generally has two flavors, the green one is seaweed flavor; the salty and golden one is the original flavor. Sweet.