You mean the yellow river scenic area? The admission fee to the scenic area is 60RMB excluding the cable car and other costs. There are bus 16 from the northwest corner of Zhengzhou Railway Station to the scenic area directly. Tourism Bus No 1 goes there direcly too. I you have 3 days, I suggest you go to Shaolin Temple and Longmen Caves. Then have one day to get around the city, maybe to see the Yellow River at that day. As to shopping, there are many stors and shopping malls in Erqi Road, Dehua Street, not far from the Railway Station. But I dont recommend, because it was so crowded there when I get there this October. For the road construction, it is a bit messy there. I think Huayuan Road is a better choice to look around.