C1275 What the hell is the orient star

Just as Shi En wanted to say something, he heard Zhang Dapao saying: "Sigh, no way, no way, where did the mistake occur? Or is the acid-base ratio wrong? "

Shi En and Shang Qian looked at each other, both could see the confusion in the other's eyes.

Shi En opened his mouth and said: "About that … "Shopkeeper …"

Zhang Dapao picked up an unknown object and angrily said