Z-18A transport helicopters took off along with Z-10 attack helicopters.
The original note indicates that they are attached to an army aviation brigade under the PLA 76th Group Army, so they belong to the 76th Air Assault Brigade.
A fire-fighting Z-8 crashed into Erhai lake near Dali, Yunnan today. Two fire fighters died during the resuscitation process and two other passengers are still missing.
They seriously need to improve the safety record of helos in China. Already around a dozen accidents this year both in military and civilian field.