1, artificial precipitation enhancement is to artificially supplement some necessary conditions for precipitation formation according to the principle of precipitation formation in nature, so as to prompt cloud droplets to quickly condense or contact and grow into raindrops and land on the ground.

2, according to the physical characteristics of different clouds, choose the right time, use planes and rockets to spread dry ice, silver iodide, salt powder and other catalysts into the clouds, so as to make the clouds precipitation or increase precipitation, so as to alleviate or alleviate farmland drought, increase irrigation water or reservoir water supply capacity, or increase power generation.

3. Generally, the method of artificial precipitation enhancement can only play a role when the natural clouds have already fallen or are close to falling. Because of the natural variability of precipitation, it is difficult to evaluate the effect of artificial precipitation enhancement. The precipitation increased by artificial catalysis is the difference between the actual precipitation after catalysis and the natural precipitation without catalysis. The actual precipitation can be measured, but whether the natural precipitation can be correctly evaluated becomes the key to the effect test.

4. It is estimated that Tangshan has not reached the condition of artificial rainfall at present, so there is no artificial rainfall.