We played sandboarding at Tengger Desert, I don't know if it's still there. Sandboarding is when two or three people sit on a wooden board and slide down the sand dunes. It's very exciting.,After playing for a few days, I went back to see that Ba Tou was still studying the sheepskin map, so I asked: "Ba Tou, you've written so much on your paper, what have you figured out",I actually know what's going on, but I didn't ask for more details.。