The era of urban rail transit has the advantages of large traffic volume, punctuality, safety, fast speed and energy saving, but at the same time, because of the closed rail transit environment, dense personnel, complexity and high mobility. In the event of accidents and emergencies, personnel evacu

As far as the current international situation is concerned, the epidemic situation is still very serious. International news has repeatedly reported the infections and deaths of domestic and foreign personnel. We deeply regret this, and also emphasized again that during the epidemic, we should reduc

Yesterday was the most anticipated holiday for children. On this day, children may be able to fulfill their small wishes, but this June is very special. Due to the epidemic,kids have become a little bit different. What in their minds may be the same as ours, we all hope this epidemic can pass quickl