What novel is Gu Huaiyan's female companion Ruan Xingtian?

This is "the era of mecha through the future"

Expansion: For the people of the whole Federation, General Xi Ting Anne is their male god, and Gu Huaiyan, the best friend of the male god, is their god of war.

Known as the federal Gemini, they are perfect in life experience, ability and appearance, and are the best companions that people all over the planet yearn for.