Xiaoguo took a deep breath and teased Zhuang Zhuang. "Are you ready?"
"I'm ready!" Zhuang Zhuang followed her and took a deep breath. His heart was about to jump out of his chest.
As soon as Xiaoguo opened the vat, Zhuang Zhuang quickly looked inside. His face was filled with disappointment. The eggs hadn't changed at all. They were still the same color.
Xiaoguo could tell what Zhuang Zhuang was thinking at a glance. "The change can only be seen inside. The exterior remains the same."
Zhuang Zhuang was full of anticipation again when he heard this. Xiaoguo brought five century eggs to the kitchen. Under Zhuang Zhuang's expectant gaze, she slowly removed the layer of mud on the outside, revealing the surface of the duck eggs. Then, she rolled them on the table. Zhuang Zhuang could already see some black portions along the cracks.
