According to Feng Shui, how to distinguish between "left opening" and "right opening" of a door?

My friend's newly-built house is about to install the gate. Because I am engaged in geomantic omen and architectural environment, I called to consult me. By the way, I sent him a picture of the location of his gate on WeChat so that I could show it to him. I hope to give him a plan as soon as possible. I am very happy after hanging up the phone, and I feel a sense of being trusted. Because he showed me the foundation at the beginning of the building, and repeatedly told him to let me know when installing the gate, because there is a saying that there are four or two houses related to feng shui and architecture. In fact, at the beginning of the construction, I had the idea of installing the gate in my mind. Now, combined with the specific pictures he sent me, I sent him the floor plan of the gate after a little adjustment.

Influenced by the traditional culture of China, most people in China inadvertently think of the harmony between geomantic omen and architecture when building or buying a house. They will take the initiative to ask professionals who have this knowledge, or they can look up relevant knowledge on the Internet themselves, and then discuss with their parents and other older generations before making a decision to make the house they build or buy comfortable, safe and satisfactory. When building a house, how should we choose the direction of opening the door, whether it is left or right, or vice versa?

Judging from the relationship between geomantic omen and architectural environment, there are roughly six ways to open doors: left inner door, left outer door, right inner door, inner door, double inner door and double outer door. Traditionally, if the hall (courtyard) is spacious, we will choose to double open the door in the middle of the house, which is what we often say. When buying commercial housing, except in special circumstances, you can only choose in the left and right order. Whether it is a single person or a double person, as long as the ratio of the gate to the house is moderate and the area is reasonable, it is good. Of course, if there is a pattern of big doors and small rooms or big doors and small rooms, it is also inappropriate.

Whether the gate should be opened inside or outside depends on the building structure and building requirements, and there is no absolute standard. Most doors generally choose to open from the inside, because there is a saying in traditional culture that opening the door to receive happiness is equivalent to an invitation. If it is open to the outside world, it will promote it. Under special circumstances, people outside the door will be injured by accident because they can't see what is outside the door, which is recognized in the relationship between traditional culture, architecture and environment. Of course, there are also some courtyard doors and sand window doors that are opened for special needs, so I won't discuss them here.

According to personal preference, it doesn't make much difference whether the door opens to the left or to the right. How to judge whether to open the door to the left or to the right is very simple. When people face the door, the lily (rubber chain) of the door is on your left, which means opening the door on the left, and the lily (rubber chain) of the door is on your right, which means opening the door on the right. It's the same whether standing inside or outside the door. Careful friends will find that the opening direction of the same door is different inside and outside, and it is impossible to judge whether the door of their home is left or right. For this reason, according to traditional habits, people usually stand in the door and face the door to judge whether the door is left or right. Although there is no difference between the left opening and the right opening of the door, I suggest that you choose the left opening as far as possible if conditions permit. Because no matter from the human physiological structure, opening the door on the left is comfortable and not embarrassing. Judging from the relationship between geomantic omen and architecture, the left is Qinglong, the right is white tiger, the left is Yang, and the right is Yin, which is in harmony with Yin and Yang.