"That thing... Looks like an old power station or sort. Does it even still working?" Zhang Tianci asked. He might be a clone, but he still has quite much knowledge stuffed in his head during the growing process. In commonsense alone, he might be much better than Zhang Qin Feng.
But right at this moment, there's no commonsense needed.
To keep an electronic interference beacon running, a constant supply of electricity is a must. Obviously, the power supply would have to rely on a different power source to run or be designed differently to keep the interference away.
Again, obviously, the former option would be a more economical one, compared to the latter. Unless it was backed by a firm financial institution to design the interference unit, the second option hardly comes into their mind.
And since that was the case, won't this make their life easier for Zhang Qin Feng and his crews?