Rather than calling him Zhong Haoran's disciple, it would be more appropriate to call him his junior martial brother.
It turned out that the person's name was Zhang Chengfan. Zhong Haoran's master had made an exception and accepted him as his disciple when he saw his talent. However, he had been delayed by matters and didn't have the time to teach him, so he had decided to accept him as Zhong Haoran's disciple first. The ceremony to acknowledge him as his master would be held after a period of time.
"To be able to catch his master's eye, one could imagine his talent. He is definitely a difficult opponent. Based on your current strength, your chances of winning aren't high."