The first half of their chat was almost the same as last time, until Yang Bingzhong started to inquire into the details of Ren Zhong's killing of the Ruined Beast, resulting in changes that continued throughout their entire conversation.
Yang Bingzhong's desire to immediately have Ren Zhong sign a Second Level Professional contract was not as intense as last time. He casually mentioned it once and then continued to test the waters.
Ren Zhong accurately caught this subtle difference.
The reason was simple: this time he only killed one Level Four Ruined Beast, while last time it was two.
Killing two in a row was enough to prove his strength.
Killing just one could be seen as a coincidence, especially since Ren Zhong announced the reason for his 'lucky survival'.
He downplayed his skill, packaging his calculated plan as an 'unexpected incident'.