The genres that really click for Shen Qiao and Luo Binghe fanfiction depend on what part of their dynamic you want to untangle. The master-disciple, betrayal, and eventual reunion gives authors a huge canvas. Character study fics are everywhere—examining SQ's guilt and fear of the original goods' fate, or LBH's obsessive, warped love. That naturally bleeds into psychological horror and dark romance; some of the most unsettling fics I've read use body horror or unreliable narration to mirror LBH's trauma.
But it's not all heavy! The papapa-and-hurt/comfort niche is its own thriving ecosystem, often leaning into domestic fluff or established relationship stuff after the main reconciliation. The System premise also invites meta and crack treated seriously fics, where characters become aware of the novel's tropes. Honestly, the pairing works across angst, smut, and comedy because the source material already juggles all three.
I keep going back to fics that remix the power imbalance, like role reversals or modern AUs where their messed-up patterns replay in an office or university setting. The genres are less about fitting them into a box and more about which tools best dissect that specific, beautiful dysfunction.