During the Devonian period, northward of Longmen Mountain structural belt is located in northwest border of Up Yangtzee Ancient Land.

在泥盆纪期间，龙门山构造带北段位于上扬子古陆的西北边缘。

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During the Devonian period, insects began to exploit terrestrial environments. Flight, the exoskeleton, and metamorphosis are probably keys to insect success.

在泥盆纪时期，昆虫开始探索陆地环境。飞翔、外骨骼、和变态可能是昆虫成功的关键。

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