Can the TV background wall be measured with half a foot?

The TV background wall can be measured by half a foot. The TV background wall is the size of the inner frame, which is called the visible light size. It's the area, not the outline size. If you order a door, that's the size of the door opening. Lu Banchi, full name of Lu Banchi, also known as Lu Banchi, is a measuring tool used in building houses, similar to the ruler used by craftsmen today. Lu Banchi, about 42.9 cm long, is said to have been written by a public school in Lu during the Spring and Autumn Period. Later, it was added to the geomantic circle to measure the good and bad luck of houses and houses, which was called the door plan. Also known as square ruler, it is mainly used to check whether the planed plates, purlins and structures are vertical and whether the edges are at right angles. 1 half a foot =0.8 foot. Soon after, Lubanchi appeared, Ding Lan ruler was integrated, and then inches and centimeters were integrated. It is an important tool for measurement and calibration. Because of its special function, it is most widely displayed in geomantic culture and architectural culture.