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Keith Yuen's academic theory
Keith Yuen first put forward a standard system of nose diagnosis design with "one bottom and two sides" in Jin Mei Bi Ding, and diagnosed tiny parts of the nose from three dimensions. Based on the theoretical support of triangular bracket, the coordinates of beautiful nose are created. In fact, each of our noses is made up of triangles with various angles. The most stable structure in the world is a triangular structure. Follow Yuan's Jinding operation to achieve the most stable nose effect. Bottom: the angle between the alar, nostril, columella and tip of nose.

"One bottom" refers to the bottom surface where the nostrils are located when viewed from the visible part of the nose, including the columella, alar and nostrils. The axis of nostril should be about 60 degrees, the nostril should be in the shape of water drop, and the length of nasal columella should be proportional.

Both sides: nasal bone, tip of nose and back of nose.

"Two faces" are two nose faces with a hump on each side of the eyes. From the two faces, we can feel the shape of the nasal bone, and judge whether the ugly nose such as a wide nose is bony or soft tissue. A normal nose is getting wider and wider from the tip of the nose to the corners of the mouth.

Triangle: The "triangle" of nose-forehead angle, nose-tip angle and nose-lip angle means that the nose-forehead angle, nose-tip angle and nose-lip angle of people should be within the corresponding reference reading range, which conforms to the oriental nose aesthetics. The nose itself is a three-dimensional triangular space, so it has very strong stability on the face. The reason why everyone's nose is high-bottomed, three-dimensional and flat depends entirely on the development of nasal bones, including hard bones and cartilage. The shape of the tip of the nose is determined by the development of alar cartilage and septal cartilage. From both sides of the nose to the tip of the nose, a very vivid "tripod" space is formed.

The shape of the tip of the nose is determined by the development of alar cartilage and septal cartilage. Relying on the bottom of the nose, a very vivid "tripod" space is formed from both sides of the nose wing to the tip of the nose. This space is where rhinoplastic surgeons practice martial arts, and the success or failure lies in this "tripod".