At the beginning, he became Wu Zhu.

In the TV series " Joy of Life " or the novel " Joy of Life," the character Fan Xian had the identity of Wu Zhu, the protector, from the beginning. Wu Zhu was Fan Xian's mother's servant when she was alive. He had carried Fan Xian on his back to escape the pursuit and had joined forces with Chen Pingping, the Director of the Qing Overwatch Council. Following Chen Pingping's suggestion, Wu Zhu handed Fan Xian over to the old lady of the Fan family to raise. Wu Zhu was a hidden great grandmaster whose strength surpassed the four great grandmasters. His martial arts were unfathomable. He was usually quiet and his eyes were covered with a black cloth. He had a delicate appearance and seemed to never grow old. He played an important role in protecting Fan Xian in the play. At the same time, he also played the role of a teacher who taught Fan Xian martial arts.

In the novel " Celebrating Years," the character Fan Xian had become Wu Zhu at the beginning. Wu Zhu was Ye Qingmei's servant and also one of the hidden great grandmasters. His martial arts were unfathomable, and his strength surpassed the four Grandmasters. Wu Zhu was usually silent. His eyes were covered with a black cloth, and his face was delicate and pretty, as if he would never grow old. After Ye Qingmei had brought him out of the Temple, he had accompanied Fan Xian and taught him martial arts. Fan Xian gradually grew up under Wu Zhu's guidance and experienced many adventures and challenges with Wu Zhu. Wu Zhu's existence played an important role in Fan Xian's growth and the development of the plot.

Wu Zhu was a character in Joy of Life. He was Ye Qingmei's servant and one of the hidden great grandmasters. His martial arts were unfathomable, and his strength surpassed the four Grandmasters. Wu Zhu was usually silent. His eyes were covered with a black cloth, and his face was delicate and pretty, as if he would never grow old. After he was brought out of the Temple by Ye Qingmei, he had always protected her and taught Fan Xian. However, he had lost part of his memory when he was assassinated in Taiping Courtyard. In the end, he and Fan Xian returned to the Central Plains and worked together to kill the Qing Emperor. They also recuperated on Dong Mountain. Therefore, becoming Wu Zhu at the beginning referred to becoming this character in Joy of Life's story.

In the novel " Celebrating Years," the character Fan Xian had become Wu Zhu from the beginning. Wu Zhu was Ye Qingmei's servant and also one of the hidden great grandmasters. His martial arts were unfathomable, and his strength surpassed the four Grandmasters. Wu Zhu was usually silent. His eyes were covered with a black cloth, and his appearance was delicate. He played an important role in protecting Fan Xian in the play. At the same time, he also played the role of a teacher who taught Fan Xian martial arts. Thus, Fan Xian had the identity of Wu Zhu, the protector, at the beginning of the story.

Wu Zhu was called the fifth brother by the Qing Emperor because they were sworn brothers. In the novel Joy of Life, Ye Qingmei pulled the Qing Emperor, Chen Pingping, Fan Jian, King Jing, and Wu Zhu to become sworn brothers. Wu Zhu was the youngest of the sworn brothers and ranked fifth. As a result, the Qing Emperor affectionately called Wu Zhu " Old Fifth." This title also expressed the Qing Emperor's closeness to Wu Zhu and the deep friendship between them.

Ku He and Wu Zhu were two characters in Joy of Life. The search results provided some information about who was more powerful. According to documents 1 and 3, Ku He was the Imperial Advisor of Northern Qi. He cultivated the Tianyi Dao Heart Technique and became one of the Four Great Grandmasters. However, documents 2 and 4 mentioned that Wu Zhu was described as a high-tech product that possessed the power of a laser eye and was unparalleled in the world. It was also mentioned in document 5 that Ye Qingmei had escaped from the temple with Wu Zhu. Wu Zhu was described as an important character. According to documents 6 and 7, Wu Zhu had displayed great strength in his sparring with Ku He, and even made Ku He admit defeat. Combining this information, one could conclude that Wu Zhu was relatively stronger. Thus, Wu Zhu was more powerful than Ku He.

Wu Zhu was even more powerful than Ku He. Wu Zhu was described as a high-tech product, possessing the power of a laser eye and was unparalleled in the world. He had displayed extraordinary abilities in battle, and could even easily defeat Ku He. Thus, based on the information provided, one could conclude that Wu Zhu was stronger than Ku He.

According to the information provided, Wu Zhu was more powerful than Ku He. Wu Zhu was described as a high-tech product, possessing the power of a laser eye and was unparalleled in the world. He had displayed extraordinary abilities in battle, and could even easily defeat Ku He. Although Ku He was Northern Qi's Imperial Advisor and also the guardian of Northern Qi, and had practiced the Tianyi Dao Heart Technique, Wu Zhu's power was far above Ku He's. Thus, based on the information provided, it could be concluded that Wu Zhu was more powerful than Ku He.

Ku He and Wu Zhu had once fought in Joy of Life, but the result did not explicitly mention who won. In this battle, Ku He was Northern Qi's Imperial Advisor and Guardian God, while Wu Zhu was a product of high technology. His martial arts were unfathomable and unparalleled. According to some descriptions, Wu Zhu's power seemed to be far above Ku He's, and he could even easily defeat experts like Lin Gong. However, the specific results of the battle between Ku He and Wu Zhu were not mentioned. Thus, based on the information provided, I am unable to determine the victor between Ku He and Wu Zhu.

According to the information provided, Wu Zhu was more powerful than Ku He. Wu Zhu was described as a high-tech product, possessing the power of a laser eye and was unparalleled in the world. He had displayed extraordinary abilities in battle, and could even easily defeat Ku He. Thus, one could conclude that Wu Zhu was stronger than Ku He.