A is one, B is two, C is three and D is four, so A is five.

A is two, B is three, C is four and D is five.

The reason for this is the following：

Jinshui, aquatic wood, Muhuo, Huotu, Tujin.

Jin Kemu, Muketu, Tuke water, water, fire, fire, gold.

So A is fire, B is wood, C is gold and D is earth.

Then according to the five elements of the number: water, fire, wood, gold and earth.

Water, the position of North Son, the first day of Son and Yang, the number of Yang, so water is one;

Fire, the location of noon is in the south, noon and the second day are cloudy, and the number is cloudy, so the fire is called two;

Wood is born in the east, east and yang, and three, odd number, is also yang, so wood says three;

Gold lives in the west, west, yin, four, even and yin, so gold is called four;

In summer in southwest China, the soil should be long, the five flowers are odd, and it is sunny, so the native land says five.

Extended data:

The Five Elements is a systematic view of China's ancient Taoist philosophy, which is widely used in traditional Chinese medicine, geomantic omen, numerology, physiognomy and divination. The meaning of the five elements includes five basic trends in the evolution of Yin and Yang: water (moistening the lower part), fire (burning the upper part), gold (converging), wood (prolonging) and earth (neutralizing).

Ancient philosophers in China used the theory of five elements to explain the formation of all things in the world and their relationships. It emphasizes the whole and aims to describe the movement form and transformation relationship of things. Yin and Yang are ancient theories of unity of opposites, and the five elements are primitive system theories.

The Taoist theory of five elements was the earliest, aiming at describing the movement form and transformation relationship of things. The theory of five elements is China's ancient analogy theory. Instead of the five elements, everything is classified into five projects according to the nature of moistening, spreading, straightening, transforming and cultivating crops.

It is different from the four-element theory of earth, water, fire and wind in ancient western countries, and it is a theory that integrates philosophy, divination, fortune telling, calendar, traditional Chinese medicine, sociology and many other disciplines.

The five elements mean that the ancients divided everything in the universe into five things: wood, fire, earth, gold and water, which are called "five elements". As early as "Shang Shu Hong Fan", it was recorded: "Five elements: water, fire, wood, gold and earth. Water is moist, fire is inflamed, wood is straight (curved and loose), gold is leather (dense and well divided), and soil is fat.

Moisten the bottom to make it salty, make it bitter on the inflammation, make it sour on the straight, make it pungent on the leather and make it sweet on the crops. "Here, not only the universe is classified, but also the nature and characteristics of each category are defined. According to the understanding of the five elements, later generations established the theory of mutual generation and mutual resistance of the five elements, mainly based on the law of "mutual generation and mutual resistance of the five elements".

Mutual development refers to the relationship between two things with different attributes that help and promote each other; Specifically: wood fire, fire produces soil, native gold, gold produces water, aquatic wood.

Mutual restraint means that the relationship between two things with different attributes of the five elements is mutual restraint; Specifically: Mu, Tuke water, water, Huo, Jin Kemu.

Five stars, called five latitudes in ancient times, are five planets in the sky. Wood is called the old star, fire is called the twinkling star, earth is called the town star, gold is called the white star and water is called the morning star. Five elements of operation, divided into 28 dormitories. Because its orbit is not far from the sun road, the ancients used it to mark the sun. The five stars generally appear in the Arctic sky in the order of wood, fire, earth, gold and water. Each star has a 72-day line, and the five stars circle 360 degrees.

The river map drawn according to the five-star astronomical phenomena is also the source of the five elements. Because mercury can be seen in the north before the winter solstice of 1 1 every year, when the winter weather comes, everything is dormant, and there are only ice, snow and water on the ground. This is how the concept of water travel was formed.

After the summer solstice in July, Mars was seen in the south. It was summer weather and the ground was very hot, so the concept of fire line was formed. At the vernal equinox in March, Jupiter appeared in the east. Just as spring came, plants sprouted and grew. The so-called "spring comes to the world to know the vegetation", and the concept of Muxing is formed in this way.

In September and the autumnal equinox, Venus appears in the west. In ancient times, weapons were represented in many ways to show the season of autumn war, and everything was old and withered, which led to Jin Xing. See Saturn in May, which means that the wet soil atmosphere is in the long summer season, and the wood, fire and gold water all take this as the midpoint. Observing the four seasons climate change caused by wood fire and gold water from the ground, the concept of soil travel is formed in this way.

The theory of five elements was originally created by the working people in ancient China, and its brilliant philosophical thoughts played an extremely important role in promoting the development of science in China. The essence of the Five Elements Theory holds that the world consists of five basic material characteristics: wood, fire, earth, gold and water. The development and changes of various things and phenomena in nature are the result of the continuous movement and interaction of these five different conditions.

People in ancient China looked up at astronomy and down at geography, far and near. According to the interaction between the sun and the moon on the earth's periodic motion in1February, a set of calendar of year, year and month for the development of agricultural production in China was developed, which was compiled into the theory of "the five elements of life and death" and has influenced it to this day.

References:

Baidu encyclopedia-five elements