描写长城的英语作文(2)

simatai section

located to the east of jinshanling, the simatai division of the great wall is 3,000 metres long and has 35 battle forts. the wall rises and falls with the precipitous mountain ridge, while the battle forts are located high up the hills.

alarm was raised by means of smoke signals, at night by fire. smoke was produced by burning a mixture of wolf dung, sulfur and saltpeter. shots were fired at the same time. thus an alarm could be relayed over 500km within just a few hours.

the great wall in four seasons

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