The size of the bedroom door is 84CM wide, which is unlucky according to the quick look-up table of Lu Banchi, but searching online from Lu Banchi is a treasure. Which one is right?

Lubanchi should use it with the compass. Judging from the size alone, it is obviously entertainment, including the website query you provided. Feng shui is not a fixed size, it is all software that you don't know how to do. If the software can tell fortune, the Feng Shui master will disappear. If a single foot can change the role of Feng Shui. A factory with production doors will never have unlucky doors because it can't be sold. Feng shui, the overall pattern, don't take it out of context, understand it well.