Kill the Immortal Official

There are thousands of sects in the world, one of which is called "Zhanxian". Chen Yu didn't know that his grandfather was the last member of the Immortal Killing Sect, so he just thought he was a bragging little old man. It wasn't until I was forced to join the army and leave my hometown that I realized that my grandfather Chen Xuan was everywhere in the world... (Multiple female protagonists, coming-of-age story, military strategy. If you are interested, you can read the previous chapter.)