The bomb was improved from a 150mm mortar shell, adding a little electronic equipment and that was enough, Xue Min had to accept. Under her command, the Xiaoluos group swung their engineer shovels and dug fiercely at the bend of the road. After digging the hole, they placed the bomb and installed the detonator, cold sweat broke out on their foreheads.. It's obvious at a glance that they have done such bad things so much!