Can you ever imagine London without Big Ben, Paris without Arc de Triomphe, Peking without the Summer Palace? Though these metropolises are all facing more urgent requirement for ground than ever before, no one would allow for the sacrifice of those invaluable historical buildings, which are not only precious record of a society's past, but more importantly the emblems of a city, a nation, or the whole human race.
Though buildings are stronger than other important society treasures such as scripts, paintings and documents as to stand against abrasion of time for hundreds or even thousands of years, they are actually as vulnerable in that once destroyed, buildings cannot be restored any more even by the best architects. …
