Two years ago, we covered the story of a group of engineers and construction workers involved in a nearly impossible endeavor. Their attempts to carve a single railway tunnel through one small mountain in Yunnan had, according to the project foreman, "tortured me for nine years". By finally solving longstanding ventilation and drainage challenges, the tunnel now has a clear completion date, something it has lacked for more than a decade.
Two years ago, we covered the story of a group of engineers and construction workers involved in a nearly impossible endeavor. Their attempts to carve a single railway tunnel through one small mountain in Yunnan had, according to the project foreman, "tortured me for nine years". By finally solving longstanding ventilation and drainage challenges, the tunnel now has a clear completion date, something it has lacked for more than a decade.