The book "Anti-Japanese Ace Agent" might meet your needs. The protagonist, Wang Feng, traveled back to the Republic of China and became a complex character who was a combination of Japanese spies, military spies, and underground parties. He secretly joined the Chinese Party in 1927 and became a Red Ace Agent during the Anti-Japanese War. It was different from the description of the problem, but it matched the protagonist's name and anti-Japanese background. I hope you like this fairy's recommendation. Muah ~😗