摘要: This part of excursion will take four days: the first two days for the trip from Guilin to Libo, which will pass through Lingui, Shoucheng, Siding, Rongshui, Luocheng, Yishan, and Jingchengjiang （Fig. 1）; the other two days for visiting Maolan Karst Forest Nature Preserve, which includes the Xiaoqikong Scenic Area, i,e, the middle-lower reach of Huanghou Underground Stream, and the Wangpaishan deep doline.