Qie Ranzhe could clearly resonate with the saying a friend in need is a friend indeed otherwise why else would he put up with Zhao Zhi's chaotic mind that resembled a blank piece of paper. Or maybe he was helping not because he is a friend but because of Qie Xieling. That kid would probably throw a temper tantrum and blame him if anything happened to Zhao Zhi.
With this thought in mind, Qie Ranzhe came up with a reasonable excuse why he would work this hard to bring Zhao Zhi out off his mental prison. Vowing to settle accounts with him later, Qie Ranzhe kept on going.
Just when he thought he was going to collapse from all the mental exhaustion the once blank corridor walls suddenly began to exhibit vivid moving murals. From what Qie Ranzhe could see, these images must have been Zhao Zhi's memories.
Please check out Venerable Demon King & The Doting Immortal