The surrounding walls have been reinforced and heightened, and even the doors have been replaced with heavy iron doors.

Moreover, a large number of traps are arranged around, and there are special guards in and out of the core area, and there are even a few vicious dogs.

Under Xu Lang's training, these vicious dogs have very sensitive noses, and they will warn if a stranger's breath approaches.

smelled Xu Ying's breath, lying in front of the iron door for two ......

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