How Is the Fire Sword Immortal Made?

Gu Ziyi originally wanted to be an honest blacksmith, play swordsmanship, read books in his spare time, marry a good wife, and have a lot of lovely children. But contrary to expectations, on the day he was sixteen years old, he was tested for his spiritual aptitude. From then on, he embarked on a spiritual journey with his family's expectations. I vow to kill all the demon cultivators in the world! Let the world be prosperous and peaceful!