Make money traveling

Richie and Tamara were sent to the hospital by Buona for treatment, but Dario had already made a backup plan, and the two would not survive more than a month.
After handing over the case, Dario took the USB flash drive back home. Leng Mengmeng and Jamiya Holiday were overjoyed. They were very happy to see the formula recovered.
"How did you solve the case so quickly?"
Katniss Berry, holding the child, looked at Dario with wise eyes, as if he felt that things were not simple.
"Just...