I'm Working on Infrastructure in Another World

Sudden death station, traveling through another world. Chen Junyan became the lowest-level clerk in the Ministry of Works, responsible for repairing toilets. The system is here: [Infrastructure Mania System has been bound. While others were cultivating immortality, he built the drainage system; while others were fighting for hegemony, he improved the cement formula. He originally wanted to fish for a living, but a bizarre murder ended up involving him—— Thousands of years of secrets are buried under the city walls. The entire capital is a huge magic circle, and the people in the city are sacrifices. "I originally just wanted to build a toilet." Do you want to know about the civil engineering dog who uses infrastructure technology to solve crimes?