The JiaShan beam alteration is a type of wall demolition project, typically involving converting the space of two rooms into one. The "JiaShan" refers to the interior wall, which is first supported by props on both sides of the wall to be removed, replacing its load-bearing capacity. After that, the interior wall is knocked down, a beam is added above the original wall position, and vertical supports are installed within the walls, securing the beam with tools. This essentially completes the JiaShan beam alteration project.