If you take the subway to Changshou Road Station and want to go to Shangxiajiu Pedestrian Street, you should pass Baohua Road.
There is Shunji Ice Room on Baohua Road: mango ice cream, coconut ice cream, Chen Tianji fish skin, boat porridge and Baohua noodle shop.
turning around is the 1th Fu Road, where there are many different kinds of cattle, such as Nanxin Double Skin Milk, Ginger Milk, Taotaoju Tea House, Lianxianglou Tea House, and Xiguan Famous Gourmet.
Next is Xiajiu Road, where there is Huangshang Lawei, Guangzhou Restaurant, and the Xu Liushan you mentioned is in Dongji Square, Minghui Square, and Xiguan Family Tea House in Liwan Square.
Go on to Shangjiu Road, where there are rice rolls in the Silver Book, Octopus Maruko in the Ship of the Sun, and Yongying Tea Restaurant.
To go to changshou road, there are Jianji Noodle Shop and Tongji Chicken Porridge on Changshou East Road, but most people don't walk to the pedestrian street from changshou road.