He Lanzhen received a package from his adoptive father who passed away a week ago.
She opened the package and saw that it was a "mobile phone", a communication tool from a hundred years ago.
She pressed and held the power button to turn on the phone.
She stared blankly at the screen in front of her, which showed the face of a young man.
His clear and sweet voice was in my ears.
"Hellow. My master."