As a special weapon for the king of Wu, the fork spear embodies the highest level of weapons manufacturing in Wu, and is also the pinnacle of weapons in this era. The technical feature of this spear is the unity of beauty and practicality. There is a blood groove on its spine, which can improve its killing ability. The whole spear is hollow, with thin wall and sharp edge, which requires high casting process. The rice-shaped dark lines on its surface are the same as Gou Jian's sword. The dark lines of Gou Jian's sword in the state of Yue have been determined to be the result of special copper sulfide technology, and the Fu Cha spear in the state of Wu should also adopt the same technology. This treatment is not only very beautiful, but also rust-proof. The spear body is also decorated with embossed animal heads and inscriptions in gold, making this bronze spear a fine work of art. It provides valuable information for studying the history of Chu State, discussing the relationship between countries in the Spring and Autumn Period and the Warring States Period, as well as the casting technology and ancient Chinese characters at that time.