C200 A Thief on a Train

Gu Chen held the bean-sized black ball in his hand and couldn't help but shake his head. He didn't know when this thing had stuck itself onto him, but with a little thought, he could tell that it was the work of his little girl. Only that heartless girl could think of such a move to track him. Even if it was a thousand miles away, she still had to know his every move.

However