Excuse my just-started-out Chinese.
English Translation
When I was a child,
Nostalgia was a tiny postage stamp.
I, on this side,
My mother, on the other.
When I was older,
Nostalgia became a small ship ticket.
I, on this side,
My bride, on the other.
Later,
Nostalgia was a shallow grave.
I, on the outside,
My mother, on the inside.
And now,
Nostalgia is a gulf, a shallow strait.
I, on this side,
The mainland, on the other.