A tricycle carrying fish pods filled with gold fish, seen in Nanjing in 2011. The golden creatures were sold for a few yuan each, depending on the fish’s size and relative rarity. Buyers carry their new pet home in a small plastic bag. They could also buy fish food.
Selling gold fish, and other small animals, off tricycles was very common in China until 2018 or so. Today these paddle pet shops are a rarity in the big cities but they are still common down country. The seller in Nanjing was on a popular spot doing good business, I remember seeing lots of kids buying, and some of his tanks were already empty when I took the picture.