Why can't we use a red background at the entrance of lanshan district in Linyi City?

The reason why lanshan district doorways in Linyi City can't use red background is that it is not good for geomantic omen to use red background doorways. The five elements of red are fire, yellow is earth, red represents customers, yellow represents shopkeepers, fire is earth, and the five elements are born together, which means auspiciousness. If red is written as white, red stands for fire, white stands for gold, fire stands for gold, and five elements stand for breaking money.