"In a way it is a very random pattern that is similar to some Chinese artworks like bowls with cracked patterns and ancient pottery that you would see in a museum," said Michael Kwok of stadium engineers Arup China.
"It portrays a very strong image to the world of what China wants to portray - a modern, strong nation with the determination to succeed in this event."
The construction of the stadium did run into trouble seven months after work started in December 2003.
There was criticism over the spiralling cost so the retractable roof, 9,000 seats, 12,000 tons of steel and 400 million yuan were cut.
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