"萬里長城全長約6700公里"的英文?

The Great Wall of China has a total length of about six thousand and seven hundred kilometres.(The Great Wall of China has a total length of about 6700 km.)
or
The Great Wall of China is about 6700 km long.
The Great Wall of China is about 6700 km in length.
or
The entire length of the Great Wall of China is about 6700 km.

The Great Wall spans 6700KM.

"萬里長城全長約6700公里"= " Great Wall for about 6700 km ."

Hope I can help you ^v^

"萬里長城全長約6700公里"

The full length of the Chinese Great wall is
approximately six thousand seven hundred kilometres.

Total length of 6700 km Great Wall

The Great Wall total length of 6700 km.