C307 Price
The trade had not started yet, so how could Lu Chen leave? Thus, at this moment, when Lu Chen was lifting his leg, he was stopped by the Emperor.
Without a trade, the emperor would not let Lu Chen leave. Furthermore, he had not tested the strength of the mortar for a while, it looked pretty good.
So, no matter what, the Emperor could not let Lu Chen leave. He even called out to Lu Chen, saying