As for the source of the white spikes, there are actually two possibilities.
One is intentionally dropped by aliens, yes, they made it clear that they want to invade the earth.
The second is... The alien driver's skills are really not good, and there is another traffic accident. The cargo spaceship carrying the white spike crashed on the earth.
The people on earth are purely unlucky and caught up with this unwarranted disaster.
As for these two conjectures, Xie Zhi feels that the probability of the former...is not high.
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