Du Fan is a decent person, not only in terms of character, but crucially, he's a genius when it comes to computers.
Otherwise, why among so many people, does Jing Junyang only lend money to him to buy a house? Clearly, he wants Du Fan's life to stabilize in the long run, so he can focus on development.
Jiang Yan's thought process is similar to Jing Junyang's, but before, both thought that Du Fan was frugal because his family was indeed in a bad financial situation and needed the money he provided. They never imagined the real situation was just that his parents wanted to shift the burden of supporting the family onto his shoulders, all to satisfy their own selfish desires and vanity.
When lending money, did no one consider that Du Fan hadn't even graduated, that he himself was still a student?
After saying enough, Jiang Yan and Jing Junyang left, leaving Du Fan to think things over by himself.