For irrigation demands in the upstream, dams annihilate the wetland in Zhalong Nature Reserve, Heilongjiang, which is the last Eden of the red-crown crane.

• 由于上游的灌溉需要，一座座水坝使黑龙江扎龙自然保护区的再也没有了美丽的湿地景象，而这正是丹顶鹤最后的伊甸园。