With the passage of time and the change of dynasties, the ancient coins also quietly lost, and the amount of life gradually decreased. Because of the irreproducibility of ancient coins, people gradually realized the significance and value of coins collection.

乾隆通宝钱币铸于清高宗乾隆年间（1736-1795年），背面的满文图案比较复杂。乾隆通宝连宝泉、宝源在内先后有29局开铸，多用黄铜与青铜，也引进国外洋铜浇制法。

The Tongbao coin of Qianlong was cast in the Qianlong period of Emperor Gaozong of the Qing Dynasty (1736-1795). The Manchu pattern on the back is quite complicated. In Tongbao of Qianlong, there were 29 casting works, including Baoquan and Baoyuan. Brass and bronze were mostly used, and foreign copper casting methods were also introduced.

下图是易先生带来的一组乾隆通宝铜币。

Below is a group of Qianlong Tongbao copper coins brought by Mr. Yi.

2件一组（Two piece one set）乾隆通宝，字从上而下而右而左直读，钱背文字沿雍正满文钱式穿孔。左边有满文"宝"字，穿孔右边铸有各局名。文字端庄稳键，笔画遒劲有力，匀称得体，布局合理，具有观赏价值。此组钱币色泽光鲜自然、纹饰深浅适度、外型美观、品相较好，业内称为“传世古钱”。

Qianlong Tongbao, the characters are read directly from top to bottom, right and left, and the characters on the back of money are perforated along the Yongzheng Manchu style. On the left is the Manchu word "Bao", and on the right is the name of each bureau. The characters are dignified and stable, the strokes are powerful, symmetrical and appropriate, the layout is reasonable, and it has ornamental value. This group of coins has bright and natural color, moderate depth of decoration, beautiful appearance and good quality. It is called "handed down ancient money" in the industry.

直径：2.6cm 厚：0.11cm 重：4.3g

Diameter: 2.6cm thickness: 0.11cm weight: 4.3g

每个时期的金钱，形状，纹理和文本都有其独特的风格和特点。金钱不仅具有经济价值，而且具有历史价值和艺术价值，乾隆通宝流传已久，且在民间呼声极高，其价值不容小觑。

Each period of money, shape, texture and text has its own unique style and characteristics. Money not only has economic value, but also has historical value and artistic value. Qianlong Tongbao has been circulating for a long time, and it has a very high voice among the people. Its value cannot be underestimated.

直径：2.43cm 厚：0.13cm 重：4g

Diameter: 2.43cm thick: 0.13cm weight: 4g

中国的钱银文明凝聚着中华民族几千年来的才智，也创造出自成体系、光芒耀眼、独具特色的东方钱银文明。这组钱币材质精良，文字细瘦高挺，笔画刚劲有力，存世量少，具有收藏价值！

China's money and silver civilization embodies the wisdom of the Chinese nation for thousands of years, and also creates a unique Oriental money and silver civilization that comes from a system. This group of coins is made of fine materials, thin and tall characters, strong and powerful strokes, and has a small amount of life, so it has a collection value!