Two is south the road, (must make up mountain rockcave) from Guyuan, Jinghe River (cool palace canyon, old Longtan).
二是南路，从固原（须弥山石窟）、泾河（凉殿峡、老龙潭）。
3
The examples in the paper show that it is suitable and convenient to use the proposed approach for the approximate judgement of rockcave strength in engineering.