Ancient transportation was underdeveloped. How are Du Li's poems widely circulated?

This poem was written by Zhao Yi in Qing Dynasty. Born in Yongzheng, he died in the last years of Jiaqing. Let's assume that this poem was written in the middle of18th century. Take this as the lower limit.

Du Fu died in 770 and Li Bai died in 762. Du Fu's poems will not be appreciated and spread on a large scale until the first half of the ninth century, about half a century after Lao Du's death. Take this as the upper limit. The difference between the upper and lower bounds is about 900 years.

So how many people are there? Let's assume that it is 10000, that is, one-year circulation 1 1. That is, once a month.

If 99999 people are assumed, there will be about11person in that year. That is to say, there are 9 to 10 people in a month, that is, one person is circulated in about 3 days.

Then I think even in ancient times, a village could achieve this frequency.

The popularity of Du Li's poems was realized under the premise of the times, the promotion of scientific and technological development, and the love and character of ancient and modern literati. If the imperial examination poems reach the emperor's ears, the emperor appreciates them and spreads them in the palace, which is caused by the unification of feudal thoughts. The people are naturally curious about the things in the palace and follow the crowd.

Ancient literati often met fresh water, sent poems by letters, and some "your words reported peace" and "pedestrians came to open the door", and poems could also travel from south to north.

For example, if I stay in this restaurant, the poems of this scenic spot will be recorded by the world and continue to be superimposed. For example, it is said that Li Bai is afraid to write poems in the Yellow Crane Tower in Cui Hao. There are also poems written by Su Shi in the scenic spots, such as "Topic Xilin Wall". Or spread further and further through word of mouth, from Dongcheng to Xicheng, and from inner city to other places. Or letters.

Since the Tang Dynasty, with the improvement of printing technology, more books and poems have been printed by block printing. Paper cultural communication is much more convenient and accurate than oral communication. Since the Song Dynasty, movable type printing has promoted the spread of culture. Therefore, the popularity of Du Li's poems was realized under the premise of the times, driven by the development of science and technology, and with the love and character of ancient and modern literati.