Beginning of the 20th century, because of the rich resources and important strategic position, the northeast area of China became the object of the competition by the big imperialist powers.
20世纪初，由于丰富的资源和重要的战略位置，中国东北地区成为帝国主义列强追逐竞争的对象。
Grasslands in China cover an area of 400 million ha, stretching more than 3,000 km from the northeast to the southwest.
中国的草地面积约40000万公顷。
Mountain marsh wetland mainly distributes at Daxing 'an Mountain area and Xiaoxing 'an Mountain area in the Northeast of China, it has great effect on adjusting the climate and improving ecosystem.
山地沼泽主要分布于我国东北的大、小兴安岭和长白山地区，这些湿地在调节气候、改善生态环境方面，发挥着巨大的作用。
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