Which is colder, Nanjing or Henan?

Nanjing is colder than Henan. According to relevant public information, the latitude in Nanjing is lower than that in Kaifeng, so the temperature in Nanjing will be high and warm in winter, while the latitude in Henan is higher and colder than that in Nanjing. Henan has a temperate monsoon climate with four distinct seasons, cold winter with little rain and snow, and Nanjing has a subtropical humid climate with mild winter with little rain.