Chang 'an in May is in early summer. What do you mean by half city green trees and half city flowers?

In May, in the early summer in Chang 'an, half the city is covered with green trees and half the city is covered with flowers. What does that mean? Chang 'an in May has just entered the early summer season, with half trees and half flowers.

Chang 'an was the capital of the Tang Dynasty, now Xi 'an, Shaanxi Province. There are four distinct seasons in this city, the temperature in spring and autumn is pleasant, and the temperature difference between day and night in summer is unbearable. This poem describes the seasonal changes of Chang 'an City in a year. Summer is coming, and the weather is getting hotter and hotter, but it is still in the cool period of early summer.

This poem also reflects the ancient people's concern and cognition of the natural environment. In ancient times, due to the limitation of traffic and information, people paid more attention to natural cycle changes and seasonal climate changes, and assisted agricultural production planning and life rhythm by observing and recording meteorological conditions. Therefore, in folk songs, poems and other literary works, there are many soft words describing climate change and common words with meteorological indicators.

This poem vividly expresses the fresh feeling of early summer and the quiet scene outside the noisy market, and also expresses a poet's fragmented personal feelings. After the precipitation and evolution of history and culture, it has become a poetic allusion with specific cultural significance and imagination.

In a word, "Chang 'an in the early summer of May" can be regarded as the inheritance and continuation of climate, season, nature and society in aesthetics and civilization.