What does Baisuishan advertisement mean?

The advertisement is based on a story that happened in 1650. The concept was changed in the advertisement, using Centennial Mountain as a metaphor for "classic, romantic, unforgettable, and eye-catching". Background of the story of Centennial Mountain

In 1650, on the streets of Stockholm, 52-year-old Descartes met the 18-year-old Swedish princess Christine. At that time, the down-and-out Descartes lived a life of begging, and his only possessions were tattered clothes and a few mathematics books he carried with him. Descartes, who was aloof by nature, never asked passers-by for charity. He just lowered his head silently and wrote and drew on paper, immersed in his mathematical world.

On a quiet afternoon, Descartes was sitting on the street as usual, bathing in the sunshine and studying mathematical problems. Suddenly, someone came next to him, patted him on the shoulder and asked: "What are you doing?" Turning his head, Descartes saw a young and beautiful face. She was Christine, the little princess of Sweden and the king's favorite daughter.

During the conversation, Descartes discovered that the girl had a strong interest in mathematics. A few days after saying goodbye to the girl, he unexpectedly received a notification from the king to hire him as a math teacher for the little princess. Descartes, who was full of doubts, only found out about the girl he met on the street when he followed the guard who came to notify him to the palace. It's Princess Christine.

Princess Christine's mathematics has made rapid progress under Descartes' careful guidance. Descartes introduced her to his new field of research-the rectangular coordinate system, which was the basis of analytic geometry later founded by Descartes. prototype. Under the leadership of Descartes, Christine gradually entered the wonderful world of coordinates. However, being inseparable every day also made them fall in love with each other. In Sweden, a romantic country, a pure and beautiful love quietly sprouted.

It didn’t take long for their love affair to reach the king’s ears. The king was furious and ordered Descartes to be executed immediately. At Christine's pleading, the king exiled him back to his country, and the princess was placed under house arrest in the palace. At that time, the Black Death was spreading across the European continent, and Descartes, who was in frail health, fell seriously ill shortly after returning to France. During the days when his life was counting down, what he missed day and night was the warm smiling face he met on the street. He insisted on writing to her every day, looking forward to her reply. However, these letters were intercepted by the king, and the princess never received any news from him.

After Descartes sent the thirteenth letter to Christine, he left this world forever. There was only one equation on this last letter: r=a(1-sinθ). The king couldn't bear to see his beloved daughter depressed every day, so he gave her this letter. Christine was ecstatic when she got the letter. She immediately found paper and pen and drew the equation. A heart-shaped pattern appeared in front of her eyes. Christine couldn't help but shed tears. This curve is the famous "heart-shaped line" ".

After the death of the king, Christine inherited the throne, and she immediately sent people to France to find the whereabouts of Descartes. What she received was the news of Descartes' death, leaving an eternal regret. This world-famous alternative love letter is still preserved in the Descartes Memorial Museum in Europe.