开元通宝为唐代货币。钱币在唐代始有“通宝”。唐初沿用隋五铢，轻小淆杂。唐高祖武德四年，为整治混乱的币制，废隋钱，最初的“开元通宝”由书法家欧阳询题写,形制仍沿用秦方孔圆钱,规定每十文重一两,每一文的重量称为一钱。
Kaiyuan Tongbao was the currency of the Tang Dynasty. Coins began to have " Tongbao" in the Tang Dynasty. At the beginning of the Tang Dynasty, the Sui and Five baht were used, with little confusion and confusion. For four years in Wude, Tang Gaozu, the original " Kaiyuan Tongbao" was inscribed by calligrapher Ou Yangxun in order to rectify the chaotic monetary system and scrap Sui money. Its shape still uses Qin Fangkong's round money, stipulating that every ten articles weigh one or two, and the weight of each article is called one money.
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开通宝”背栗特文-价格：RMB日期
唐“开通宝”金质赏钱一枚------价格：RMB日期
开通宝背三朵云开炉钱价格：RMB日期
开通宝折十钱-----价格：RMB日期
唐“开通宝”金质赏钱一枚------价格：RMB日期
Price of Kaiyuan Tongbao Market in Recent Years: Opening Treasure " Back Litter" - Price: RMBDate 10 Tang's " Opening Treasure" Gold Medal - Price: RMBDate 11 Opening three clouds in Baobei to open the furnace - price: RMBdate 06 Opening of Treasure Fold Ten Money - Price: RMBDate 03 Tang's " Opening Treasure" Gold Medal - Price: RMBDate 21
在质量上，一般的开元通宝每文重一钱，每十文重一两，每贯（即一千文）重六斤四两。每文重二铢四丝，折合质量约4克。但在唐玄宗开元年间，由于处于盛世，开元通宝的铜料增加了一到二成，这时的开元通宝质量约为4.5克至5克，因而厚重的开元通宝也多半是此时铸造。在样式上，初唐开元通宝光背无文，中唐起钱背开始有星、月及其他纹饰，晚唐会昌开元则在钱背面加上钱局所在地名。经过三百余年铸造，版别复杂。唐代以后仍有冶铸，但样式大多与唐有别。在规格上，开元通宝基本是小平钱，但唐代也铸有少量“开元通宝”折十大钱，属开炉纪念性质，后代也有伪造。
In terms of quality, the average Kaiyuan Tongbao weighs one dollar per article, one or two cents per ten articles, and six catties and four ounces per penetration ( i.e., one thousand articles ). Each article weighs two baht and four silk, equivalent to about 4g. However, during the reign of Emperor Xuanzong of the Tang Dynasty, the copper material of Kaiyuan Tongbao increased by one to twenty percent due to its prosperous time. The quality of Kaiyuan Tongbao at this time was about 4.5g to 5g, so the heavy Kaiyuan Tongbao was mostly cast at this time. In style, there was no writing on the back of Tongbao in the early Tang Dynasty, star, moon and other decorations began to appear on the back of money in the middle Tang Dynasty, while the name of money bureau was added to the back of money in the late Tang Dynasty. After more than 300 years of casting, the edition is complicated. After the Tang Dynasty, there were still smelting and casting, but the styles were mostly different from those of the Tang Dynasty. In terms of specifications, Kaiyuan Tongbao is basically small flat money, but in the Tang Dynasty, a small amount of " Kaiyuan Tongbao" was also cast with ten big money, which belongs to the nature of opening a furnace to commemorate the occasion and is also forged by future generations.