This animation might be the Legend of the Dragon Sword. It was a the mainland of China that was broadcast in 2002. It told the story of the protagonist Li Yunxiang between the dragon race and the human race. Li Yunxiang had a dragon scale that could turn into a sword, which made him a true dragon warrior. He grew and fought with the young dragon in the process of adventuring and finally protected the entire world. Although this animation was relatively old, it had extremely high production quality and a profound plot that was deeply loved by many viewers. If you have any more questions about this animation, please continue asking.