The girl that appeared out of the tianshu bamboo writing strip is Yun, a doll made using Mujia.
Yun calls the sword that appeared out of the tianshu the legendary Xuan Yuan Sword. Through Yun, Yin and Ning acquire new power.
Meanwhile, with a single word from Empress Cheng, Zhao is made chief engineer. He now works on developing constructs.
Mo Heng, who betrayed the empire and joined the rebel army, is also working on a new weapon he calls black fire armor.
Since I was a child, I studied engineering 
at the palace and was made an engineer.
ومُذ صغري درستُ الهندسة في القصر
وأصبحتُ مهندساً
Seit meiner Kindheit habe ich im Palast die
Ingenieurskunst gelernt und wurde Ingenieur.
Desde niño, estudié ingeniería
en el palacio y llegué a serlo.
Desde niño, estudié ingeniería
en el palacio y llegué a serlo.
J’ai appris la mécanique à la cour
depuis mon plus jeune âge,
Sin da bambino, ho studiato ingegneria al Palazzo
 e sono diventato un ingegnere.
Desde pequeno, estudei engenharia
no palácio e virei um engenheiro.
С самого детства я постигал искусство
в палатах и получил должность инженера.