Looking back at the cliffs and coast, I am walking in the forest among the clouds. The old man said that this ink-like black poplar dominates the sandy land, but the layers of black poplar are wrapped in a stretch of indescribable branches and vines. ——————If you don't see the head of Qinghai, no one has collected the ancient bones. Annotation: Volume 216 of "Zizhi Tongjian": "In April of the tenth year of Tianbao, Jiannan Jiedu envoy Xianyu Zhongtong attacked the Nanzhao barbarians and was defeated in Hunan. At that time, Zhongtong had 80,000 soldiers. The... Army was defeated, and 60,000 soldiers died. Zhongtong only escaped with his life. Yang Guozhong To cover up his defeat, he still recounted his military exploits. ... People heard that there was a lot of malaria in Yunnan, and there were 18 or 10 soldiers who died before the battle. Yang Guozhong sent the censor to seize the troops and sent them to the Yi Army Station with flagers. "