Is the "Yantai" in The Longest Day in Chang 'an really Yang Guifei in history?

Although the story background of the TV series The Longest Day in Chang 'an took place in the Tang Dynasty, in order to avoid collision with real history, the names of most of the main characters in the TV series were homonymized on the basis of the original novel, such as Yan Yu's fantasy and Yan Song, and her character prototype was actually the historical Yang Yuhuan Yang Taizhen.

Nowadays, we are used to calling Yang Yuhuan Yang Guifei, but few people know that there is another street in Yang Yuhuan called "Taizhen", right? There is a saying in the Book of the Old Tang Dynasty, "The princess wears a Taoist robe, which is called' too true'." Yang Yuhuan used to be a Taoist woman, but Taizhen was just her name. Later, after entering the palace, many people still used to call her Princess Taizhen.

As for why Yang Yuhuan wanted to be a Taoist, it was actually similar to when Wu Zetian became a monk. As we all know, Yang Yuhuan was the concubine of Li Mao, the longevity king, and Emperor Xuanzong of Tang Dynasty took a fancy to Yang Yuhuan. But he is an open emperor and can't take the world by storm and rob his son's wife.

So Tang Xuanzong remembered Wu Zetian's experience. He also wants to learn from Wu Zetian, try to get Yang Yuhuan out of the palace for a period of time, and then silently turn her into his own woman.

It happened that Dou Taihou, the mother of Emperor Xuanzong of the Tang Dynasty, died 50 years ago. Emperor Xuanzong of the Tang Dynasty took this opportunity to order Yang Yuhuan, the immortal princess, to leave the palace to be a female Taoist priest and pray for Dou Taihou. In this way, she successfully passed the status of female Taoist priest and got rid of the title of Princess Shou. After that, she returned to the palace again and became Li Longji's favorite princess of the Tang Dynasty, Yang Guifei of the Tang Dynasty.