In the fourth season of the Star Change, Hou Fei and Xiao Hei just completed the Nine-Nine Heavy Robbery at the beginning and became the masters of the Dacheng Period, and if they did not survive the Nine-Nine Heavy Robbery, they needed to change the strength of the Twelve Scattered Demons to soar, but if they successfully survived the Nine-Nine Heavy Robbery, as long as they converted the Yuan Force in their bodies into the Demon Yuan Force in a few years, they would automatically soar.
Therefore, Hou Fei and Xiao Hei did not need to cultivate to the twelve plagues like Fang Khotan or Zong Qian to ascend (Both Fang Khotan and Zong Qian were converted to scattered demons after the failure of the Nine-Nine Heavy Raids).
The fourth season is mainly about the treasure hunting reverse yang fairy land, Qin Yu also successfully survived the ninety-nine robbery before entering the reverse central realm, and later Qin Yu's three brothers all entered the reverse central realm, but Hou Fei and Xiao Hei flew up to the immortal demon realm shortly after entering the reverse central realm, and since then the three brothers have separated.
Qin Yu, on the other hand, was brought to Huangshi Star (another planet, the Hidden Dragon Continent belonged to Ziwei Star) after coming out of the Reverse Yang Wonderland, and was brought to Huangshi Star by the Immortal Realm emissary Hua Yan, the Demon Realm emissary Du Zhongjun, and the Dragon Clan emissary Ao Feng, a person who had cultivated on the Yellowstone Star for 150 years and returned to Ziwei Star after successfully breaking through hengzhou and returned to Ziwei Star after a brief relationship with his father, eldest brother, second brother and clan, and the clan.