The characteristics of inclusions in natural and synthetic gems are distinct due to their different forming mechanisms and can be utilized for distinguishing gems.

According to the characteristic of Bao-guang section of Bao-cheng line and the operation of SS7D/E locomotive at this section in the past six months this paper points out the SS7D/E type locomotive is not suitable to operate at this section and proposes to restore the use of SS6B locomotive at this section.

In 1981, the August 21 rainstorm in western Sichuan basin and July 21rainstorm in southern Shaanxi caused overflow of rivers and down flush of sediments,reulting serious disasters, such as flood, mudflow,landfall,landslide and falling stone at713 sites along Baoji-Chengdu railway line.