In the quiet room.
Zhang Yu merely tapped his finger, and the metallic powder before him floated back and forth with the vibrations of his mana, forming a spherical shape, then dispersing into a cloud-like form.
Turning Earth to Gold, the sixth of the Seven Extremes of Civil Engineering, is a martial art that refines metal with mana.
However, for Zhang Yu, cultivating this technique wasn't as troublesome as for others. As long as he repeatedly manipulated the metallic powder to undergo various transformations, he could continuously increase his practice frequency.
After several hours, Zhang Yu finally pushed Turning Earth to Gold to Level 10 and let out a light sigh of relief.
At this moment, a knocking sound came from the door, followed by Xiao Yun Ji's voice.
Xiao Yun Ji: "Zhang Yu, are you done? We're ready to set off."
Zhang Yu opened the door and said: "Mm, let's go."
