In 2078, at the Cosmic Plant Research Center in Jupiter's orbit, a young astronaut Lin Yue (25 years old) was accidentally involved in the turbulence of time and space and traveled to 711 AD due to an accident in an artificial black hole experiment.
The only thing that traveled with him was the "lychee cabin" powered by nuclear fusion (equipped with a fuel extraction device that can extract fuel from seawater). The lychees inside have been adaptively genetically modified and have a high survival rate. (So the place he traveled through was arranged in the coastal areas of Jiangsu and Zhejiang)
In the coming era of the prosperous Tang Dynasty, Lin Yue decided to survive in this era by relying on a warehouse of lychees.