The reason for Wu Zhu's amnesia was that he had been injured in the battle with the Temple Envoy, causing his memory to be damaged and forgetting all memories related to the Temple. In addition, he had been assigned the mission of assassinating Fan Xian by the Temple. This had also caused him to lose a portion of his memories. Even though he had lost his memory, Wu Zhu still protected Ye Qingmei's descendants, regarding their safety as his instinct. Wu Zhu's identity was the guardian of the temple, and he was also an intelligent robot in the military museum that was built before the nuclear explosion on Earth. As the most powerful and intelligent robot in the temple, he had always been guarding the safety of the temple. Although he had lost his memory, Wu Zhu ultimately did not execute the order to kill Fan Xian. This showed that he had developed human feelings. Thus, Wu Zhu lost his memory because the Temple had erased all his memories.
Wu Zhu's amnesia in the novel, Celebrating Years, happened in the twenty-fifth episode.
The reason why Wu Zhu lost his memory was because he had suffered memory damage during the battle with the Temple Envoy, and he had forgotten all memories related to the Temple. In addition, he had been assigned the mission of assassinating Fan Xian by the Temple. This had also caused him to lose a portion of his memories. However, Wu Zhu had recovered his memories through Fan Xian's warm awakening. In the novel " Celebrating Years," Fan Xian and Wu Zhu met in the Temple. Wu Zhu was defined as an intruder who tried to kill Fan Xian. Fan Xian's interaction with Wu Zhu gradually restored Wu Zhu's memories. Finally, he recuperated on Dong Mountain. Thus, Wu Zhu had recovered his memories through Fan Xian's warm awakening.