Is there a fourth season?

No, according to official website who inquired about Gan Xiayi, Shen Dan and Shin Kuhn, as of June 27th, 2023, Gan Xiayi, Shen Dan and Xin Jian had three seasons, but there was no fourth season for animation. The online animation Jian Wang 3, Chivalrous and Brave, Shen Jianxin was produced by Shengying Animation. It tells the story of Shen Jianxin's determination to become a generation of heroes. After he joined the Chunyang Palace, a great sect in the Jianghu, he mistakenly knew the peerless secret skills of Chunyang Palace, but he knew nothing about his own stunts. He stepped into the rivers and lakes, grew up gradually, and saw the ups and downs in the disputes between rivers and lakes in the prosperous Tang Dynasty.