Mordekaiser's fingertips slid rapidly on the touch screen, and dense green codes scrolled on the screen like running water. The line-by-line fingerprint feature point extraction algorithm was continuously optimized under his debugging. The cold light in the laboratory shines on his angular face, and the ultra-thin anti-blue light glasses on the bridge of his nose reflect a faint blue light. At this moment, he is focusing on overcoming the core problem of the "multi-modal biometric fusion recognition system" - how to simultaneously achieve millisecond-level accurate matching of fingerprints, iris, and veins in the extreme environment of minus 40 degrees Celsius.