In the morning, you can have breakfast with the characteristics of Confucius Temple in Yonghe Garden or Lianhu Pastry Group Store. If you like sweets, you can choose red beans, lotus seeds and Yuanxiao from Lianhu Cake Group. If you don't like sweets, you can choose steamed stuffed bun, jiaozi, Kaiyang and dried silk from Yongheyuan.
The weather in the morning is cooler, so it is suitable for visiting various cultural attractions of Confucius Temple, such as Dacheng Hall, Wangxie Ancient Residence and Jiangnan Palace Garden. The pet market and commodity market you mentioned are in the east of Gongyuan in Jiangnan.
At noon, you can choose the food street of Dashiba Street for dining.
In the afternoon, you can visit Zhanyuan or Bailuzhou Park nearby, where there are many shady trees, rockeries and running water, which are suitable for afternoon leisure.
For dinner, you can choose the Qinhuai Eight-stop Snack Package of time-honored brands (such as Yixianlou and Qinhuai Family). ), or you can choose to find the most distinctive snacks in the street, such as Huang Ji bean jelly next to Yonghe Garden.
After dinner, you can choose to take a boat to enjoy the beautiful scenery of Jiangnan water town and the Imperial Capital of Jinling, and experience the feeling of "the smoke cage is full of sand in the cold moon and near Qinhuai restaurant at night".
These are my personal suggestions as a local who grew up by Qinhuai River.