In the long river of history, there is an ancient and majestic city. It stands on the vast land and has witnessed countless changes. This city has thick walls, solid gates, and hardworking and brave people. It is the home in people's hearts, a symbol of civilization, and a lighthouse of hope.

However, the peaceful days did not last long. One day, the sound of war drums and bugles came from afar. A powerful foreign army was approaching the city. After the city lord learned of this news, he was extremely anxious and didn't know how to deal with it. He summoned the generals and advisers in the city and discussed countermeasures together, but everyone was lost in thought and no one could come up with an effective solution.

Just when the city lord and everyone were at a loss, a Taoist priest in the city caught their attention. This Taoist priest was dressed in a simple Taoist robe, with long hair flowing, and his eyes revealed a profound wisdom. He had been practicing in the mountains all year round and had a deep understanding and mastery of Taoist Qimen art.

After hearing about the crisis facing the city, the Taoist priest decided to step forward and contribute his own strength to protect the city and the people. He came to the city lord, bowed slightly and said, "My lord, I have a method that may be able to resist the attack of foreign enemies." After hearing this, a glimmer of hope flashed in the city lord's eyes and he quickly asked, "What good plan does the Taoist priest have?" The Taoist priest slowly said, "I can use Taoist Qimen art to set up a mysterious formation. This formation may exert great power and resist the enemy's attack."

Although the city lord did not understand Taoist Qimen art, at this critical moment, he could only choose to believe the Taoist priest. So, he ordered the Taoist priest to be fully responsible for setting up the formation. After getting the support of the city lord, the Taoist priest immediately took action. He first observed the terrain of the city and the surrounding environment, and then according to the principles of Taoist Qimen art, chose a suitable location as the core of the formation.

Next, the Taoist priest began to collect various materials, such as stones, wood, ropes, etc. He used his magic to place these materials in a specific order and way, gradually forming a mysterious formation. In the process of setting up the formation, the Taoist priest was fully concentrated and undistracted, as if he was integrated with the whole world.

When the formation was completed, the entire city was shrouded in a mysterious atmosphere. People could feel a powerful force surging, as if an invisible big hand was guarding the city. The Taoist priest told the city lord and the people that this formation was called the "Taiji Bagua Formation". It was set up according to the Taoist theory of yin and yang and the five elements and the art of Qimen Dunjia.

Soon, the foreign army arrived under the city. When they saw the defenders on the city wall who were waiting in full battle array and the mysterious formation, a trace of doubt arose in their hearts. But they did not retreat. Instead, they decided to launch an attack and try to break through the city in one fell swoop.

When the foreign army rushed towards the city, the formation began to take effect. Only to see beams of light shooting out from the formation like sharp swords, stabbing at the enemy. The enemy was caught off guard by this sudden attack and fell to the ground one after another. They tried to break through the shackles of the formation, but no matter how hard they tried, they couldn't move forward half a step.

Under the protection of the formation, the defenders of the city were greatly inspired. They picked up their weapons one after another and launched a counterattack against the enemy. In the fierce battle, the formation always exerted great power and continuously weakened the enemy's strength. In the end, under the attack of the formation, the foreign army had to retreat.

The city successfully resisted the enemy's attack. The people cheered and were full of gratitude to the Taoist priest. The city lord also admired the Taoist priest's Qimen art. He personally came to the Taoist priest and expressed his gratitude to him. The Taoist priest smiled slightly and said, "This is all the credit of Taoist Qimen art and also the result of everyone's concerted efforts."

In order to let everyone better understand Taoist Qimen art, the Taoist priest began to explain the mysteries to everyone. He said that Taoism emphasizes following nature and pursuing the balance of yin and yang. Qimen art is to master the laws of nature by observing and calculating everything in the world, so as to achieve the purpose of seeking good fortune and avoiding bad luck.

The Taoist priest also told everyone some Taoist allusions. For example, in the battle between the Yellow Emperor and Chi You, the Yellow Emperor got the help of the Nine Heavens Mysterious Girl and learned the art of Qimen Dunjia, and finally defeated Chi You. There is also Jiang Ziya who assisted King Wu of Zhou and used Qimen art to defeat King Zhou of Shang and establish the Zhou Dynasty. These allusions gave everyone a deeper understanding of Taoist Qimen art and also made them full of confidence in the future.

Under the influence of the Taoist priest, the people in the city began to learn Taoist thoughts and cultures. They learned to follow nature, respect life, and pursue harmony. They also understood that only by uniting as one can they overcome difficulties and protect their homes.

As time passed, this city became more prosperous and powerful. People always remembered that battle to protect the city and the Taoist priest's achievements. And Taoist Qimen art has also been passed down in this city and has become a kind of belief and strength in people's hearts.

In the days to come, this city may still face various challenges, but with the protection of Taoist Qimen art and the unity of the people, it will definitely be able to continue to stand firm and bring peace and happiness to people.