According to the plot of the anime "Dragon Warrior Season 7", Lu Ziyuan and Tianle have returned. That's why Luziyuan and Tianle appeared.
Fight the Dragon is a series of domestic cartoons produced by Guangzhou Baiyi Animation Production Co., Ltd. and directed by Liang Qibo. On July 1 1, it was broadcast on Tencent Video, Youku Video and Mango TV platforms.