The development plan of Heishan gorge section on the Yellow River has been studying for more than 40 years, but any decision has not been made for some reasons.
黄河黑山峡河段开发方案研究已40余年，由于某些原因未能作出决策。
The development plan of Heishan gorge section on the Yellow River has been studying for more than 40 years, but any decision has not been made for some reasons.
黄河黑山峡河段开发方案研究已40余年，由于某些原因未能作出决策。
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