"However, we found that three days ago, these two people received 5,000 yuan in transportation fees. They had been working for the creditor's transportation company for more than a year without ever receiving a salary. This month was the first time they received any form of payment. Thus, we can infer that these two received a salary as their debts had been paid off. As for who paid it off, we could not find any large transactions made by the transportation company's accounts. However, if we can find the loan shark that had hired these two, and find out who paid off their debts, we would be able to determine if there was any relationship between the three of them."