The investigator looks at the invoice. The date on it is 13th of the month. She thinks for a while. Then, she dials a number and says, “Help me to check whether Qianfu Jewelry received a payment of amount four hundred thousand yuan in its account on 13th of the month.”

Xia Ning feels a little nervous. She knew that they would check about it. But she still feels worried.

After a few minutes, the woman’s phone rings. She takes up the phone and listens to it. ...