Shallow Time Fades Away the Years

Stardate 3900 Feichen was diagnosed with a congenital disease However, the treatment method has been lost in the 21st century. I thought that the disease could be cured slowly, but I didn't expect... In order to avoid dying so quickly, the eldest brother of the Fei family sent him back to the 21st century. After twenty years, Feichen's search was fruitless and he had no choice but to return. However .....................