He crushed his cigarette on the windowsill.
Yao read the anger in him and dared not reply.
"Mr. Jie, there's another thing, the letter sent to Ning Yanan, someone really signed for it." Yao said, excitement evident in his voice.
"It seems she really hasn't left America, maybe even close by; this is her response, just a map with no explanation of its meaning."
Yao handed the piece of paper up to him.
It was just a map, a very large one at that, with no marks whatsoever.
"Get me a ruler." Dan Hanjie spread the map out, moved the straightedge over several areas, recorded some numbers with a pen, and finally calculated coordinates.
"She wants to meet me right here." Dan Hanjie's long finger landed on a café in the center of the street.
His captivating eyes shimmered with a ghostly light as he stared at the map on the table.
This prime number encryption for mapping was a well-known military spatial positioning method.