Precisely, how long is the Great Wall? This has been a long-unanswered question, as many dynasties in Chinese history built, modified or extended the Great Wall. But now, the State Administration of Cultural Heritage has announced a definite number after a seven-year investigation.

Twenty-one thousand one hundred and ninety-six point one eight Kilometers (21,196.18 km), That is the precise length of the Great Wall, which was included as a World Heritage Site in 1987.

Kilometers (21,196.18 km), That is the precise length of the Great Wall, which was included as a World Heritage Site in 1987.

Built over two thousand years ago, the Great Wall is one of the largest construction projects ever completed. It's a series of fortifications made of stone, brick, wood and other materials built across the historical northern borders to ward off invaders.

Although it is also called "wan Li Chang Cheng", which means ten-thousand li long wall in Chinese, this is only a description for a very, very long wall.

To get the precise length of the man-made masterpiece, the State Administration of Cultural Heritage began surveying the wall in 2006. More than 2,000 technicians worked on the comprehensive survey using state-of-the-art technology, in 15 provinces, municipalities and autonomous regions. The project proved to be very difficult as the Great Wall zigzags and winds up and down mountain edges and valleys.

新聞資訊：

在第七個(gè)“文化遺產(chǎn)日”來(lái)臨之際，國(guó)家文物局5日在北京居庸關(guān)長(zhǎng)城發(fā)布了長(zhǎng)城資源調(diào)查和認(rèn)定成果——中國(guó)歷代長(zhǎng)城分布于15個(gè)省區(qū)市，總長(zhǎng)度為21196．18千米，包含遺產(chǎn)43721處?？缭?5個(gè)省區(qū)市；長(zhǎng)達(dá)21196.18千米；相關(guān)長(zhǎng)城遺產(chǎn)43721處——這樣一組數(shù)據(jù)意味著，目前全國(guó)僅僅7萬(wàn)名的文物工作者，都來(lái)保護(hù)一處處長(zhǎng)城遺產(chǎn)，也依然捉襟見肘。古人有能力修筑如此規(guī)模的建筑，是奇跡；今人若能保護(hù)好古人創(chuàng)造的奇跡，也應(yīng)算是創(chuàng)造了新奇跡。

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