C781 The Smart Lulu(1)

Although the entrance to the three mines was already closed, there must be a passageway inside that could be connected to each other. Even if there was no passageway in the past, Hai Canglong had sent people to dig it up later on. The connection between the three mines was unobstructed.

Sun Muyu happened to be in charge of the security of number two mine, so she also came to the monitoring room