Blue Sky Blade

During the restructuring of the Baotou Steel Plant in Inner Mongolia, the national intangible cultural heritage "Secret Techniques of Quenching the Mongolian Scimitar" was patented by a foreign company. Female engineer Wu Lan (heir of a family of swordsmiths) discovers that the secret thief is related to the case of counterfeit steel that caused her father to be paralyzed due to a work-related injury. She joins forces with retired workers to set up a trap using the "ice spring quenching method" that has been passed down for thousands of years. Using a batch of special steel as bait, during the restart ceremony of the steel plant's blast furnace, the blade will show evidence of guilt in the flames.