If Chu Fengmian killed Riyang Gongzi outside, Riyang Hall Master would definitely be able to deduce that it was Chu Fengmian who killed Riyang Gongzi. At that time, provoking an Eight Tribulation Ancient Emperor would be extremely troublesome.
However, within Zangxian Continent, even if Chu Fengmian killed Riyang Gongzi, not even a celestial could deduce how it happened.
Zangxian Continent has always been a good place to resolve grudges through killing. Every time Zangxian Continent emerges, numerous martial artists come not to fall at the hands of the dangerous grounds within, but by the hands of their enemies.
This Riyang Gongzi probably also figured out the identities of Chu Fengmian and Luo Kang, so he avoided making a move outside and planned to act in Zangxian Continent.
"Not easy to act outside, but within this Zangxian Continent, if Riyang Gongzi is killed, then so be it!"
