Complex sentence: Before the railway, the purchasing power of 100 RMB in Lhasa was only commensurate with 54 RMB in coastal regions of China mainly due to high transport costs, the railway could elevate the living standards along the railway.
Split into simpler sentences: Before the railway, the purchasing power of 100 RMB in Lhasa was only commensurate with 54 RMB in coastal regions of China, mainly due to high transport costs. The railway could elevate the living standards along the railway.