In Jin Yong's martial arts novel "The Demi-Gods and Semi-Devils", Xu Zhu has left a deep impression on readers with his unique life experiences and profound martial arts skills. Especially in the final battle, he successfully defeated the evil martial artist Ding Chunqiu with the help of Shengsi Fu, demonstrating his wisdom and courage. However, many people may wonder why Xu Zhu, who already possessed nearly a century of internal power from Wu Yazi, still needed to rely on Shengsi Fu to defeat Ding Chunqiu.

Firstly, it is essential to understand that martial arts proficiency is not solely determined by the depth of internal power. Although internal power is the foundation of martial arts, factors such as techniques, skills, and combat experience are equally important. Xu Zhu, despite possessing nearly a century of internal power from Wu Yazi, had not yet reached a corresponding level in martial arts techniques and combat experience. On the other hand, Ding Chunqiu was a renowned martial arts master with profound skills, unique techniques, and extensive experience. Therefore, relying solely on deep internal power does not guarantee victory in a battle.

Secondly, Shengsi Fu is Xu Zhu's unique weapon, possessing extraordinary power and effects. Shengsi Fu is a concealed weapon that is inserted into the enemy's body through special techniques. Once activated, the enemy will experience extreme agony and be torn between life and death. The power of this concealed weapon lies in its unpredictability and surprise, making it difficult for the enemy to defend against. Despite Ding Chunqiu's high martial arts proficiency, he had no defense against this special concealed weapon.

Furthermore, Xu Zhu's wisdom was also a crucial factor in his victory over Ding Chunqiu. In the battle, Xu Zhu not only relied on his physical strength but also utilized his intelligence. He cleverly exploited Ding Chunqiu's arrogance and underestimation of him, as well as his fear of Shengsi Fu, successfully inserting the concealed weapon into Ding Chunqiu's body and securing the victory.

In conclusion, Xu Zhu's ability to defeat Ding Chunqiu with Shengsi Fu stemmed from his skillful utilization of his internal power, unique concealed weapon, and wisdom. This once again demonstrates that martial arts proficiency is not solely determined by the depth of internal power but rather a comprehensive application of techniques, skills, combat experience, and wisdom.

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