As the two ventured deeper underground, the temperature started to rise rapidly due to the lack of temperature control. The air became hot and humid, and the enormous drilling machine continued its incessant operation. According to Brother Wang, the machine had been running non-stop for over fifty days and nights since the construction began, not taking a single break!
With such high-intensity operation, the machine's axle would heat up. Although someone would periodically add water for cooling, it only managed to keep the axle temperature within a controllable range. The temperature of the rotating axle remained consistently high, radiating heat all around, causing the temperature at the eleventh level relay station to maintain at least seventy degrees!
It's not uncommon for it to even break past a hundred degrees Celsius!
