Su Han brought Lu Changshan to have a look at the underground tunnels linking Huiyuan City with South City, which were fifty meters deep, seven meters high, and fifteen meters wide, when displayed before his eyes.
The only thought in Lu Changshan's mind was: He, Lu Changshan, had invested in this project.
This was no longer merely a trading passage to avoid monster attacks, but a real retreat route.
To put it further, even if it weren't used for trading, if one day Linshui City was breached by monsters for some reason, this tunnel would become a survival route for two or three hundred thousand people.
Its importance was self-evident; regarding issues such as defense and anti-infiltration after the tunnel was connected, these were already minor details.
Without any hesitation, Lu Changshan set the trade volume between Linshui City and the Tree Domain.
