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 shook my head and piled up ten or so sheets of white paper. "Too difficult," I said. "The day before yesterday, I went to the Yin Chuan Museum and copied a character from a sheepskin scroll. I asked a deputy researcher for help, but... he didn't recognize it either.","That's right," he sighed, "The researcher surnamed Ma shook his head after seeing my copied characters. He said it was a special kind of Xi Xia script, similar to palace writing, used only within the small circle of Partyuan noble clans. It's very difficult to translate now."。