Shooting Stars

It's about spy in republican era, sneaking between the KMT, CPC and the Japs. Hiding, sneaking around and passing messages

I think these two dramas are similar because they both depict a character who is simply following his ideas and living his life, but he meets someone from the Communist Party and is unknowingly involved.
In War of Faith, the importance of the Communist Party appears later than in Shooting Stars, and both dramas are not just about Communism; War of Faith is also about the economy, while Shooting Stars is about police work and justice.

Same vibe. Same era, very similar setting and plot. Not quite the same story but both had school setting and were based in the era of the Japanese occupation of China and young people fighting for freedom and country.