Which dynasty did Liu's poems belong to?

At the end of the Sui Dynasty, there was a place where the Liu family lived in Liujiaguan, Miaoxia Town, Ruzhou, Henan Province. This is a beautiful and naive girl, born in a scholarly family. She has been able to play chess, calligraphy and painting since she was a child, and she is very popular with her neighbors. Then her parents died one after another, and the girl came to Chang 'an and settled down with her brother and sister-in-law who were often officials. After the demise of the Sui Dynasty, her brother and sister-in-law died one after another, leaving her with nowhere to go, and she saw through the world of mortals and became a nun. When she became a monk, the young girl took Bai Mudan, which was planted in her original home, to the temple to show her devotion to Buddhism and lead a completely clean life. Under her careful management, Bai Mudan is very lush and beautiful. Flowers bloom, big and complete, double petals, red in white, crystal clear and moist, such as beauty's skin and children's face. Viewers all praise its beauty and praise its beauty. Therefore, every April, many faithful women come to this temple to worship the Buddha and watch the flowers, taking pleasure in offering flowers to the Buddha, and the incense is getting stronger and stronger. Therefore, these flowers came from Liu's residence, hence the name Liu's Pavilion, also known as Liu's Pavilion. Later, this peony variety spread to Tian Peng, Sichuan and Heze, Shandong, and its fragrance spread far and wide.