C55 Necklace(2)

Jiang Feng was thinking about where to start when his stomach started growling. He rolled up his sleeves and looked at his watch. It was past 12 o'clock in the afternoon. "I'm a little hungry. Let's eat first. I'll tell you when I'm full. "

Jiang Feng opened his backpack and took out a camping mat. He picked up a few small stones and pressed them on the four corners