→Chinese Dynasties and Empires
Nevertheless, warmer conditions lasted until about 350 CE, covering nearly eight dynasties and ending around the Six Dynasties period. During warmer periods, citrus, such as oranges, may have made their way to China and began to be incorporated into diets. Subtropical herbs and spices were also likely introduced in period when warmer conditions prevailed, as these plants were more easily grown in northern regions that allowed the major centres of China, such as Chang'an in the Han Dynasty. After 350 CE, much colder conditions became evident in northern China, with much harsher winters. This may have led to the development of ice houses for the first time, which allowed better preservation of food over the winter periods. This also likely led tastes in food to change back away from the subtropical foods that could have been grown in other parts of China.
==More Recent Climate Change==