開元通寶為唐代貨幣。錢幣在唐代始有“ 通寶”。唐初沿用隋 五銖，輕小淆雜。 唐高祖武德四年（公元621年），為整治混亂的幣制，廢 隋錢，效仿西漢五銖的嚴格規範，開鑄“開元通寶”，取代社會上遺存的五銖。
最初的“開元通寶”由書法家 歐陽詢題寫，面文“開元通寳”，形制仍沿用 秦方孔圓錢，規定每十文重一兩，每一文的重量稱為一錢，而一千文則重六斤四兩。
藏友張叔錢幣
Kaiyuan tongbao is the currency of Tang dynasty. Coins began to have " tongbao" in the Tang dynasty. In the early Tang dynasty, the sui five baht was used, but it was light and confusing. For four years ( ad 621 ) in wude, Tang Gaozu, in order to rectify the chaotic monetary system and scrap sui money, we followed the strict norms of the western Han dynasty five bahts and forged kaiyuan tongbao, replacing the five bahts left in society.
The original " kaiyuan tongbao" was inscribed by Ou Yangxun, a calligrapher, and the facial expression " kaiyuan tongwu" still followed the pattern of Qin square hole round money, stipulating that every ten articles weigh one or two, and the weight of each article is called one money, while one thousand articles weigh six catties and four taels.
開元通寶是唐代第一種貨幣，也是世界第一的錢幣，沿用時間最長的貨幣。由於其質量合理，通貨控制得當，錢幣做工比較精美，故深受百姓喜愛。開元通寶已經成為大五帝錢的一部分，具有 辟邪，旺財的功效。
Kaiyuan tongbao is the first currency in Tang dynasty and the first coin in the world. it has been used for the longest time. Because of its reasonable quality, proper currency control and exquisite workmanship, it is deeply loved by people. Kaiyuan tongbao has become a part of the big five emperors' money, and it has the efficacy of ward off evil spirits and prosperous wealth.
開元通寶，尤其是初唐的，用料講究，做工較為細膩，因年代久遠，內部成分會有變化。銅質被氧化，盡脫火氣。將真品開元擲於地上，聲音暗啞低沉，而偽品則清脆響亮，真品開元通寶很多都是從土中挖掘得到的，有純正的泥土香味，而偽品鏽色來源於迅速的化學反應，往往有刺激性氣味，密度是物質的一種特性，可以拿與幾個開元通寶相同質量或相同體積的同種物質，真品的開元通寶在相同質量的情況下，體積也相同。而偽品在相同質量的情況下，體積比它同一種物質大；在相同體積的情況下，質量比它同一種物質小。如果是不同質量和不同體積的，而且是同一種物質的，則計算它們的密度，再比較，密度與同一種物質相同或接近的是真品，但是密度比同一種物質小的是偽品。
Kaiyuan tongbao, especially in the early Tang dynasty, is exquisite in materials and exquisite in workmanship, and its internal composition will change as time goes by. Copper is oxidized, and all the internal heat and gas are removed. Throwing the genuine kaiyuan on the ground has a dull and deep voice, while the fake products are crisp and loud. many of the genuine kaiyuan tongbao are excavated from the soil and have pure soil fragrance, while the rust color of the fake products comes from the rapid chemical reaction, which often has pungent smell, and density is a property of the substance. you can take the same substance with the same quality or volume as several kaiyuan tongbao, and the volume of the genuine kaiyuan tongbao is the same under the same quality. But under the condition of the same quality, the volume of counterfeit goods is larger than that of the same substance. In the case of the same volume, the mass
開元通寶存世量極為稀少，尤其是品相好＊更為稀缺。因此很受收藏＊好者青睞，具有很高＊歷史價值、藝術價值和收藏價值
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