What is the meaning of the old saying in Ningbo that "you have eaten Fenghua taro after walking through the No.6 pier in Sanjiang"?

There used to be an old saying in Ningbo that "I walked through the three customs and six docks and ate Fenghua taro", which means that some people are well informed, have traveled many places and seen many new things. The "three customs" in this proverb refers to Shanhaiguan, Jiayuguan and Zhennanguan from a distance; One in the east, one in the west and one in the south, which are far apart. "Six Wharfs" refers to the five trading places (Guangzhou, Xiamen, Fuzhou, Ningbo and Shanghai) at that time, plus Hankou in Wuhan.

However, judging from the spread time of proverbs, it is impossible for people with financial difficulties to run that far, so some people say that there is another set of proverbs called "Walking through Pier 6 in Sanjiang and eating taro in Fenghua". Of course, "Three Rivers" refers to Fenghua River, Yuyao River and Yongjiang River in Ningbo. There are docks on both sides of each river, which adds up to "six docks". At the same time, Fenghua taro is really delicious, and Fenghua taro can only be planted in Fenghua. If planted in other places, the taste will not match.