He brought pingxiu along because of the unknown key that Yi kun used to curse him to death.
Gongzi Liang had already figured it out. It was one of the three keys to open the divine Kingdom's ruins.
With this key, he could use the divine Dao techniques he had cultivated during his rest days as a guide to find the location of the divine Kingdom ruins.
However, in order to open the ruins of the divine Kingdom, he still needed a God to guide him, or to gather the other two keys.
According to the information provided by ping Xiu, the other two keys were in the hands of the nine Dragon sanctuary and an ancient orthodoxy.
With Gong Ziliang's current strength, he didn't have the ability to break into a Holy Land or an ancient orthodoxy to seize the key.
Therefore, Gong Ziliang brought along Lin anruo, who was a 'Reaper'...
Gongzi Liang's plan was to activate the 'Reaper' divine will in Lin anruo's body after finding the divine Kingdom ruins.