The exhibition hall was silent.

But Xia Lei’s brain had not been silenced for even a second – it was like an engine running at top speed. The calculations and analysis going on in an instant was not something that an ordinary person could imagine. It was incredible! However, he himself felt that it was very normal, and natural. While his mind raced for the answer, he was able to appreciate the artistry of the Mona Lisa in a calm manner.

Da Vinci’s technique was breathtaking. He had applied the paint to canvas, layer by layer, and each layer was different. The different colour layers had been mixed together, and it played on light to give shape to this renowned piece of artwork. No matter which angle one looked at the woman in the frame, her smile was still so sweet, so enchanting.

The last layer of paint disappeared from his sight, and he finally saw the canvas itself. In that moment, Xia Lei stopped, and his eyes shone with excitement.

There were lines drawn in pencil on the canvas. These lines made up a mountain peak, a river and a bridge. It was a map!

There were also words written in Italian between...