Twenty-two-year-old Lin Nian received a train ticket from his grandmother and took the maglev from Shanghai to Prague.
She found a yellowed note in the gap between the train seats, written seven years before she was born:
"Lin Wan is waiting for you underground. Thirty days."
She didn't know who Lin Wan was, she didn't know why her great-grandfather left the key to her, and she didn't know—
Her own name was given to her by a person in the gray area who used his last strength.
From the old drawers of Golden Key Lane, to the seventh pier of Charles Bridge, to the golden cracks four kilometers below the earth's crust.
She met a man she had been waiting for for three thousand years.
The man said: "You are only three years older than me, so don't rush to be a junior."
Intention: Waiting itself is an active and continuous love.