Yang Guifei's favorite lychee, Yang Guifei eat lychee in the end which place?

Now there is no reliable evidence to prove positively that the lychee eaten by Yang Guifei was produced in Sichuan or Chongqing, but we can use the counterfactual method to prove that the lychee she ate could not have been produced in Guangdong or Fujian.

We don't have any information about how lychee was transported in the Tang Dynasty, but we do have information about the transmission of expedited documents in the Tang Dynasty, which show that:

An expedited document sent from Guangdong took about 9 days to reach Chang'an;

An expedited document sent from Fujian took about 10 days to reach Chang'an;

An expedited document sent from Chongqing took about 4 days to reach Chang'an. days to reach Chang'an.

Transmitting lychees wouldn't be faster than transmitting an expedited official letter anyway, would it?

If you understand the characteristics of lychee, you will know that lychee can be kept for 4-5 days at most after picking, and after that period, it will be spoiled and inedible.

The above is enough to exclude Guangdong and Fujian.

In fact, during the Tang Dynasty, although there are no official records, some literati recorded that the lychee eaten by Yang Guifei was sent there precisely from Sichuan (near Chongqing) or the Chongqing area. But there is no record of lychee being sent from Guangdong and Fujian to Chang'an.

There is another fact, although it does not prove anything, but it is useful for reasoning: Yang Guifei is a Sichuanese, she is likely to have enjoyed eating lychee when she was in Sichuan, so after entering the palace, she would have asked for the lychee to be sent to Changan by an expedited method.

With historical records of Yang Guifei eat lychee produced in Fuzhou, is today's Fuling, Li Zhao "Tang State History Supplement" recorded: "Yang Fei was born in Western Sichuan, good food lychee. Born in the South China Sea, especially better than Shu, so every year to speed into. However, the party heat and heat, through the night will be defeated, the descendants do not know."　Xie Fangde "Tang Poetry Jiejie commentary": "Ming Huang Tianbao, Fuzhou tribute litchi, to Chang'an, color and fragrance unchanged, the princess is happy. States and counties to postal transmission of speeding away to say on the will, horses and men dead, looking at each other in the road." Fuzhou is where it is, today Fuling, Chongqing. Visible Yang Guifei eat lychee is not produced from Hejiang.