Openkirin | Link

It was not a single ROM like LineageOS, but rather a "base" or a set of common trees and patches that allowed developers to build AOSP-based ROMs (like Pixel Experience, LineageOS, or RevengeOS) for Kirin-powered devices.

OpenKirin is a team of independent developers dedicated to providing stable, stock-Android-based ROMs for Huawei and Honor smartphones powered by HiSilicon Kirin processors. Their primary goal is to strip away the complex EMUI (Emotion UI) layers and replace them with a lightweight, highly customizable firmware. openkirin

It was a technically impressive project that showcased the talent of the open-source community. It successfully allowed users to escape EMUI on devices from 2016–2018. It was not a single ROM like LineageOS,