In ancient times, the mining of stone materials was called "gong yu" (working on jade), which has two meanings. One refers to the processing and polishing of jade, as mentioned in the Book of Songs, Xiaoya: "Stones from other mountains can be used to work on jade." The other refers to the mining of jade, as recorded in the Mu Tianzi Zhuan about Emperor Mu of Zhou ascending Mount Kunlun.
The exhausted scientific expedition team returned to their residence from the source of the Baiyu River, facing serious personnel reduction.