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.
We can recommend the following novels similar to Engineer Ming:
1. " Ming Dynasty 1621: The Lion of Liaodong ": The construction engineer Chen Chu traveled to the Liaodong Peninsula in 1621 and was committed to creating a glorious Ming Dynasty for the people of the world.
2. " The Great Ming Reboot Project " was a novel similar to " The Strongest IT Engineer ". It told the story of an engineer during the Ming Dynasty.
3. [Chaotic World Book: A novel by the author Ji Cha. It is also one of the works similar to [The Strongest IT Engineer].]
4. " Spirit Realm Walker " was a novel written by the author, Little Langjun. It was also one of the works similar to " The Strongest IT Engineer."
5. Tang's Table: A novel by the author Jie Yu. It was also one of the works similar to The Strongest IT Engineer.
These novels all have similar topics or plots to Engineer Ming, and they might suit your taste. I hope you like it!
" 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.