I used to remember when the rocket was launched, there would be a lot of water vapor. At school, the teacher said that there was a lot of water under the launcher because the rocket was launched.

According to experts familiar with the matter, just at the bottom of the Long March 3A rocket, there is a 6-meter-high, two-story-deep water tank filled with clear water, which is used to cool the rocket when it is launched. When the rocket is ignited and launched, the water boils completely in a few seconds due to the influence of heat, rolling up a lot of bubbles and making a loud noise. At the moment when the rocket leaves, several tons of water in the tank will quickly evaporate below 1/3.

It is impossible to completely consume the huge heat energy released by the combustion when the rocket is launched only by the two-layer water tank with a depth of 6 meters underground. Its function consumes at most 1/3, and the other part is consumed by another cave secret passage.

According to experts, the flaming flame generated by rocket fuel at the moment of launch (that is, the flame when the rocket takes off as seen by the audience on TV) cannot be completely consumed by water, and the excess flame will be released through a back road connecting the mountain near the launch tower. In the back passage of this hill, the reporter saw some trees repeatedly damaged by flames, which were much lower than the lush trees around.