This is the earliest form of the World Expo. 5th century AD, Persia held the first exhibition features beyond the market.
这就是天下博览会的最早情势。公元5世纪，波斯举行了第一个逾越集市成果的展览会。
This is the earliest form of the World Expo. 5th century AD, Persia held the first exhibition features beyond the market.
这就是天下博览会的最早情势。公元5世纪，波斯举行了第一个逾越集市成果的展览会。
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