Lychee only grown in southern China.Transportation system was not well developed in ancient times and lychee can easily deteriorated,so the lychee consumed by Tang Dynasty's Yang Guifei were delivered by fast horses services,whose riders would take shifts day and night in a non-stop manner,to northern China.
  Lychee only grown in southern China.Transportation system was not well developed in ancient times and lychee can easily deteriorated,so the lychee consumed by Tang Dynasty's Yang Guifei were delivered by fast horses services,whose riders would take shifts day and night in a non-stop manner,to northern China.