During the Spring Festival travel period, at least more than 100 pieces of oil will be tested every day. These oils mainly play a role in lubrication, cooling and insulation, just like human blood.
If there is a problem, it will affect health and safety. This year's Spring Festival, our unit has a total of 539 sets of EMUs running online, 100 more than usual. We check at least 100 gearbox oils and 15 transformer oils each day. The time is very tight, and everyone gets busy immediately.