Why didn't Feng Jiu tell Emperor Bai Gun Gun about his existence in the starlight enchantment?

" Pillow on the Book " was a fantasy novel. It had some descriptions of the existence of the starlight enchantment and the white roll. The Starlight Enchantment was a mysterious space. It was said that only those with powerful spiritual power and cultivation could enter. In the novel, Feng Jiu was a very powerful spirit power and cultivator. She could enter the starlight enchantment and cultivate in it. However, she did not tell Emperor Bai Gungun about her existence because she did not want him to be involved in the dispute of the Starlight Barrier. Bai Gun Gun was a very cute young man. In the novel, he was Feng Jiu's disciple. Although Feng Jiu had shown great interest in him, Bai Gun Gun was not interested in the path of spiritual cultivation. Therefore, he would not join the dispute of the starlight enchantment. The Starlight Enchantment was an extremely mysterious space. Feng Jiu didn't want to reveal her ability or existence to Emperor Bai Gun Gun because she wanted to protect him and didn't want him to be involved. This was also a plot design in the novel. It increased the emotional conflict and suspense between Feng Jiu and Emperor Bai Gungun by creating a gap between them.