Therefore, the principles have to be obeyed are as follows: law of value, law of demand and supply, overall planning principle, water saving promotion, and operation step by step.
为此，要遵循价值规律原则、供求规律原则、统筹安排原则、促进节约用水原则和逐步到位原则。
Therefore, the principles have to be obeyed are as follows: law of value, law of demand and supply, overall planning principle, water saving promotion, and operation step by step.
为此，要遵循价值规律原则、供求规律原则、统筹安排原则、促进节约用水原则和逐步到位原则。
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