準(zhǔn)確地說(shuō),長(zhǎng)城到底有多長(zhǎng)?這是一個(gè)一直以來(lái)懸而未決的問(wèn)題,長(zhǎng)城在中國(guó)歷史上經(jīng)歷了諸多朝代建立、修筑或擴(kuò)建。而現(xiàn)在,中國(guó)國(guó)家文物局在結(jié)束了7年的調(diào)查宣布了一個(gè)準(zhǔn)確的數(shù)字。

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.
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.