Consideration is given to the maintenance of vacuum tubes, which demands significant electrical energy and massive costs to ensure pipeline gas tightness. Can the requirements for vacuum degree and gas tightness be lowered by using a novel method where the locomotive head heats the air in front of it, reducing the density of the air to minimize resistance? Essentially, the pipeline remains unchanged, but no longer requires gas tightness or vacuum extraction. Instead, the pipeline wall is drilled with a certain number of holes, and the locomotive head continuously heats the gas inside the pipeline, temporarily reducing its density and expelling it through the holes. Clean air has minimal absorption of laser energy, which is why it cannot be effectively heated by laser. To address this, a misting or other device is installed on the locomotive head to make the air usable for laser heating, while controlling the laser power to only heat the air in front of the head, up to a certain distance. The following is a thought experiment, scribbled down during a late-night session.