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",Not only did Yelü Renzhi invent this widely used Xia script, but he also invented an additional type of Xia script for the nobility, with different character meanings and connotations. This could be considered a "pro" version of the Xia script.。