The original title of the book: "X Memory Speed of Five Centimeters Per Second"
Also known as "My Lover Tang Taizong"
"I was originally here to save one person's life and two people's marriage, but instead I caused a lot of trouble for heroes, generals, Khans, and Emperor Taizong of the Tang Dynasty. Oh God! Let me complete the task as soon as possible. I want to go home!!"
A graduate of the British Royal Military Academy accidentally entered the time and space of the prosperous Tang Dynasty due to an experiment, and wrote a period of burning passion. From Chang'an to Dunhuang, the eastern capital Luoyang to the foreign lands of the Western Sea, the submergence and continuation of the Asoka Dynasty in India, the Silk Road as far away as Türkiye and the Roman Empire, the cross-century exploration of Japan and England...
The Ashley Lee Legend Series is a very wide-ranging series. The first part was a science fiction series - "Snow of the Sahara". This part has a higher romance content, so I'll put it here.
According to the chronological order of the protagonist's growth, this film should be before "Snow in the Sahara".