Copper was money in the Tang Dynasty. Using the sea of ​​copper to store water and place it in the courtyard was also a symbol of wealth.

Wu Huaiyu didn't think much about it at first. He just thought that a copper vat weighing 1,800 kilograms would weigh more than 600 kilograms if he had one hundred copper coins. Two hundred copper coins would weigh more than one thousand kilograms.

Li Daozong seemed to talk casually about the extraordinary nature of his copper seas, each of which could store six thousand kilograms of water.

Huaiyu felt something unusual when he heard it, "A sea of ​​copper can store six thousand kilograms of water, so how big is this sea of ​​copper?"

"It is more than four feet high and more than five feet in diameter."

"How much?"

"Eight thousand pounds each."

"Made of pure copper?" Huaiyu was surprised. One thousand copper coins weighed six kilograms and four taels, which is a hundred taels. One thousand, two hundred and eighty copper coins only weighed eight thousand kilograms.

If it is pure copper, then a pound of copper is actually worth more than a pound of money. After all, copper coins are mixed with lead and tin.

In the backyard of Li Daozong's governor's mansion, there is a sea of ​​eight gates.

"It's not pure copper."

Huaiyu thought it was okay to hear that it was not pure copper, but Li Daozong added that it was gilded with a layer of gold on the outside.

Each jar is gilded with a hundred taels of gold on the outside and cast of pure copper on the inside.
Chapter completed!