The words from above came from this person's mouth.
After the Sword Cultivator came up, Xu Yun took the initiative to hand him a cigarette—Xu Yun himself doesn't smoke, but he has a habit of carrying a pack just in case:
"Sir, is there anything unusual in that pipeline?"
"Tsk, Tsk, Yuxi, thanks man."
The maintenance worker took off his gloves, grabbed the cigarette, tucked it behind his ear, and then said:
"Unusual? Nothing unusual, just that one section of the pipeline smells much less than the other areas."
Xu Yun instantly became interested:
"Smells much less?"
The maintenance worker nodded and stretched out his calloused left hand, pointing to the manhole cover:
"The pipelines under the basketball court are 1800mm in size...that is 1.8 meters, and further ahead there are some 2400mm ones and a main external one that's 3000mm."
