I suggest you take a taxi directly to the south of Yujiekou, west 100 meters or so, and drink sheep intestine soup, which is delicious. After eating, you can go to Yujie and Longting. Then turn around along Longting Lake to the west, and you will pass Tian Bo Yangfu, Qingming Shanghe Garden and Iron Tower (you need to ask). Go to the first floor of Kaifeng in Gulou Square to eat steamed buns at noon. After eating, you can go to Suoguo Temple, Baogong Former Residence and Baogong Temple (all not far from Gulou Square). In the evening, it is recommended not to go to Gulou Square to eat night market, which is too expensive and the quality is average. Kaifeng people usually go to Sisi Square to eat night market. It is more cost-effective than Gulou Square. After eating, you can take a taxi or a tricycle to the railway station, or you can take a bus to Jin Ming Square (the last bus can arrive in Zhengzhou around 10 in the afternoon, 1 hour).