```
The work began in earnest.
First, Lin Wu went to the room next to the Blood Heart to find a building materials package, taking along some hardware products according to Maya's needs. Where there was hardware, there were bound to be building materials, no problem.
Second, Lin Wu returned to the base, where Maya constructed the workshop.
Third, Maya contacted her family through the radio and, with the help of Su Shi, who was a real engineer, designed a pulley-like device that could wind and unwind a rope by turning a handle. Under Su Shi's guidance, a catch was installed so that when it was released, the rope would be fixed.
Fourth, Lin Wu took Maya's repeating crossbow and started killing.
