1. Prepare rectangular paper.

2. fold in half.

3. Fold one side down by about one third, fold the other side in the same direction, and the folding lines on both sides are aligned.

4. The four corners are folded in half with the middle intersection as the axis, and then the upper part is turned down into a trapezoid.

5, pulling the long sides apart, plastic sealing and ingot casting.

Yuanbao is an ancient currency, made of precious gold or silver. Generally, there is much silver and little gold. In the currency history of China, gold and silver were officially called "gold ingots", which began in the Yuan Dynasty. However, as early as the early Tang Dynasty, when Kaiyuan Bao Tong came to the world, the people had the meaning of taking huge money, which was pronounced as "opening an ingot".

In the Yuan Dynasty, gold and silver money was called "gold ingot", which means the treasure of the Yuan Dynasty. Gold is called gold ingot and silver ingot is called silver ingot, which has both political meaning and common name of gold and silver currency.

Yuanbao originated in the Tang Dynasty, and in the early days of the establishment of the Tang Dynasty (780~783), it was recorded that a large amount of silver was used to pay horses. From the unearthed treasures, it is also confirmed that there were silver "cakes" and "collars" in the Tang Dynasty, that is, a boat-shaped "silver collar" with a back like a boat and a back like a desk.

The word "Silver Collar" was called "Yuanbao" in Yuan Dynasty. From the Yuan Dynasty to the Yuan Dynasty, Pinghuai Treasury (then the national treasury) cast silver into an "ingot". Anything that emphasizes 50 yuan is called "Yuanbao", which means "the treasure of the Yuan Dynasty".