The reason they're doing this is, of course, because they want to see Su Changfeng and hope he can forgive them, giving them a glimmer of hope to live.
The security guard at the entrance is a man with a brain. After receiving the money from the naive boy, he didn't dare stay at Su Changfeng's house any longer. So he hurriedly took the money and went downhill, presumably to flee Jiang City.
Before he reached the entrance, Su Changfeng spotted the naive boy. After all, his outfit was too bizarre, and his hair color was excessively bright.
Seeing Su Changfeng approaching fast, the naive boy's father hurriedly whispered, "Su Changfeng is coming, I don't care what means you use, you must make him forgive you. Can our family still survive in Jiang City? Keeping our lives depends on one word from Su Changfeng."
