I've Already Built a Cannon, but You're Still Practicing Your Sword

After traveling through the world of martial arts and becoming the most useless outer disciple of the sect, He Zhuying discovered something. People in this world are good at Qinggong, internal strength, and can fly over walls and walls. But they don't understand chemistry. Don't know how to smelt. I don't even understand industry. Then. While others were still practicing swordsmanship hard, he had already created the first fire gun...