water conservancy

The red blossom of Dazhai blooms everywhere

The red blossom of Dazhai blooms everywhere (1974, October)

Transform the Hai River, temper yourself

Transform the Hai River, temper yourself (1958, August)

Water conservancy works in the First Five Year Plan

Water conservancy works in the First Five Year Plan (1956, February)

Great plans to transform the Yellow river

Great plans to transform the Yellow river (1956, February)

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