The information provided by the gunslinger TV series did not mention that the series had 40 episodes, nor did it mention that it could be watched for free. Therefore, I don't know if the gunslinger TV series has 40 episodes and if it's free to watch.
" Remaining Sin " was a super web drama co-produced by Xin Li Media and iQiyi, adapted from Chang Shuxin's novel of the same name. The drama told the story of Yu Sin, a police academy student, who started from a special selection and encountered various thrilling events after becoming an undercover. Although the search results provided did not have any specific highlights, based on the plot introduction and the description of the related videos, it could be seen that " Remaining Sin " was loved by the audience with its thrilling plot and wonderful acting skills. Zhang Yishan, Wu You, and the others were the leading actors in the play, and Zhang Rui was the director. Although no specific highlights were provided, one could look forward to the exciting plot and excellent performance of the actors in the play.
" The Gunslinger " was a Chinese the mainland of China directed by Zhao Qing and starred by Luo Jin, Miao Pu, Yu Zhen, etc. It had a total of 36 episodes. The plot revolved around the sharpshooter, Tang Yujin, who had won the shooting championship. He was a general practitioner who had returned from Germany. He opened a clinic in Shanghai and treated patients while secretly searching for the murderer who had assassinated his father. The story took place on the eve of the Battle of Songhu, where all walks of life in Shanghai united to fight against the Japanese. Tang Yujin had originally stayed out of it, but after experiencing the pain of his fiancée and his family dying under the Japanese gun, he resolutely joined the New Fourth Army and joined the annihilation of the Japanese invaders, becoming a hero of resistance on the battlefield in northern Jiangsu. The drama was first broadcasted on Jiangsu variety channel on December 23, 2014, and was released on Tianjin TV's Happy Theater on December 5, 2015.