Quite a sense of accomplishment

Gu Nian's eyes moved. I've been thinking about something recently. I've been thinking about it since the beginning of this year. I've been delayed and haven't taken any action. We can try it before the new year. Once it's done, not only can we strengthen the defense of our city gate tower, but we can also build roads. This way, the roads from other states to kun city won't be so rugged. Moreover, we can use this to ask the Emperor for help."

Gu Xin,'sister, is it the cement that you mentioned? It can make city walls that can't be pushed down, make the road more flat, and won't be muddy when it rains?"

"Yes!" Gu Nian nodded. It was this! Let's go to the nearby area tomorrow. I need to find some materials and then make a workshop. Also, father, go and tell old general Peng that I want to go to their smithing place to find something."