Wu Feng was one of the stronger rudimentary Kings of Gods, and his strength was on par with Du Qian Jun.
Although Chu Han's innate talent and comprehension skills were better than Du Qian Jun, he was only slightly stronger than Du Qian Jun due to him being almost 1,000 years younger than Du Qian Jun. If he were the same age as Du Qian Jun, there was no doubt he would be much stronger. Hence, strength-wise, he was still slightly lacking compared to Wu Feng who was older than Du Qian Jun.
"Junior Brother Duan, they're clearly underestimating you," Wu Feng said through Voice Transmission.
After witnessing Chu Han's law of ice, Wu Feng knew Chu Han could very well be on par with him. Moreover, as a disciple of the emperor-rank Flying Dragon Sect, Chu Han would definitely have a mediocre divine artifact. At this moment, he was truly glad he managed to obtain a mediocre divine artifact for himself during his previous trip back to the Hidden Fog Sect.