At your service | Ministry of Emergency Management's "May Day" holiday safety tips At your service | Ministry of Emergency Management's "May Day" holiday safety tips At your service | Ministry of Emergency Management's "May Day" holiday safety tips At your service | Ministry of Emergency Management's "May Day" holiday safety tips At your service | Ministry of Emergency Management's "May Day" holiday safety tips At your service | Ministry of Emergency Management's "May Day" holiday safety tips At your service | Ministry of Emergency Management's "May Day" holiday safety tips At your service | Ministry of Emergency Management's "May Day" holiday safety tips At your service | Ministry of Emergency Management's "May Day" holiday safety tips At your service | Ministry of Emergency Management's "May Day" holiday safety tips Source: Ministry of Emergency Management of the People's Republic of China Editor/Yin Xiaojie Editor-in-charge/Chen Jiechen and Wu Bin Producer/Zhang Bo