Joy of Life Wu Zhu regained his memory in episode 28.

Wu Zhu had recovered a portion of his memories in the novel, Celebrating Years. Through Fan Xian's warmth and concern, Wu Zhu gradually regained his consciousness. Even though his memories had been erased, under the influence of Fan Xian, Ye Qingmei, and the others, he had successfully recovered a portion of his memories. At the critical moment of his confrontation with the Qing Emperor, Wu Zhu took off his blindfold and revealed a powerful laser, indicating that he had recovered his memories. Thus, Wu Zhu finally recovered his memories during the celebration.
Wu Zhu appeared in episodes 9, 10, 18-20, 25, 28, 32, 33, 34, and 46 of Joy of Life.
Wu Zhu's weapon was a laser eye. In Joy of Life, Wu Zhu did not use his laser eyes until the last moment. At the end, the Qing Emperor used his hand knife to cut open the black cloth on Wu Zhu's face. Only then did the laser eye activate. Wu Zhu was unable to move before he lost consciousness, so if the laser eye was a weapon he controlled, he would not be able to use it after he lost consciousness. Therefore, Wu Zhu chose to use his laser eyes at the last moment.
Wu Zhu's weapon was a laser eye. In Joy of Life, Wu Zhu did not use his laser eyes until the last moment. At the end, the Qing Emperor used his hand knife to cut open the black cloth on Wu Zhu's face. Only then did the laser eye activate. Wu Zhu was unable to move before he lost consciousness, so if the laser eye was a weapon he controlled, he would not be able to use it after he lost consciousness. Therefore, Wu Zhu chose to use his laser eyes at the last moment.
Wu Zhu's memories had been erased by the Qing Emperor. In the novel, after Ye Qingmei died, the Qing Emperor was worried that Wu Zhu would avenge Ye Qingmei, so he did something to Wu Zhu's eyes and erased his memories.
In Joy of Life, Wu Zhu's memories were erased by the temple. The temple was a military base left behind after the fall of a highly advanced civilization. Wu Zhu was discovered as a robot in the temple, and his memories were erased there. Although he had lost his memory, Wu Zhu still retained his instinct to protect the descendants of Fan Xian and Ye Qingmei. He did not carry out the mission of killing Fan Xian.
Wu Zhu's memories had been erased by the Temple. In the " Joy of Life," Wu Zhu was a robot. After his memories were wiped away by the Temple, he was even given the task of assassinating Fan Xian. Although Wu Zhu had forgotten Fan Xian, out of instinct, he ultimately did not execute the order to kill Fan Xian.
Wu Zhu's memories had been erased by the Temple. In the " Joy of Life," Wu Zhu was a robot. After his memories were wiped away by the Temple, he was even given the task of assassinating Fan Xian. Although Wu Zhu had forgotten Fan Xian, out of instinct, he ultimately did not execute the order to kill Fan Xian.
Wu Zhu's memories had been erased by the Temple. In the " Joy of Life," Wu Zhu was a robot. After his memories were wiped away by the Temple, he was even given the task of assassinating Fan Xian. Although Wu Zhu had forgotten Fan Xian, out of instinct, he ultimately did not execute the order to kill Fan Xian. Wu Zhu's memories had been erased by the Temple.
During the Qing years, Wu Zhu's memories were erased by the Temple. The temple was a military base left behind after the fall of a highly advanced civilization. Wu Zhu was discovered as a robot in the temple and his memories were erased there. Although he had lost his memory, Wu Zhu still retained his instinct to protect the descendants of Fan Xian and Ye Qingmei. He did not carry out the order to kill Fan Xian. Thus, Wu Zhu's memories had been erased by the Temple.