At the southern edge of the North China Plain lie the Qinling Mountains.
在中国北方平原的南部边界坐落着秦岭。
At 1,500 kilometres long, they run like a backbone through the middle of China. Deep within the mountains is a maze of remote valleys and forests, home to strange and wonderful creatures.
1500公里的蜿蜒崎岖宛如横穿中国的脊梁。深山中隐藏着偏僻幽寂的山谷与森林，这里是那些神奇生命的乐土。

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重点讲解：

a maze of

（街道、房间、地道）错综复杂；迷津；

eg. The tented ceiling hides a maze of water pipes.

形似帐篷的天花板上隐藏着迷宫似的水管。

eg. I followed him through a maze of narrow alleys.

我紧随他穿过一条条迂迴曲折的窄巷。