C127 Inventing Cement

What a good Jiang Gan. Huangfu Yuchen secretly wrote it down for Jiang Gan, then looked at Yan Ge: "Ge, what do you think?"

Yan Ge muttered to himself, then let out a faint smile, "This couplet was originally a couplet I accidentally overheard when I was coming down from the south. It is said that no one came out to match the couplet, and I had pondered for a while at that time