What is the representative culture of Japan's "bird" era?

In the history of Japanese culture or art, the reign of Nara Daiwa in the 7th and 8th centuries is often divided into the era of "flying birds", the era of "Bai Fenghuang" and the era of "Nara" after moving its capital to Heichengjing. According to the founding years of temples, it is the best way to understand Nara ancient temple. Horyuji is the earliest existing temple in Nara, and its artistic and cultural value ranks first in Japan. When it was completed in 607 AD, Shoto Kutaishi personally presided over the opening ceremony. Unfortunately, the Buddhist pagodas at that time were all burned down in the fire more than 60 years later. Today, Asuka-style buildings are still preserved, leaving only the Jintang in the West Courtyard, the Pentecostal Tower, the Middle Gate and some cloisters in Galand. "Galand" is Sanskrit, meaning temple. The aesthetic concept of Asuka period mainly followed the Wei, Jin, Southern and Northern Dynasties in China, which was heavy and steady with certain seriousness. Entering from the south gate of Horyuji, the Galand complex in the West Courtyard is dark in color and orderly in level, which really gives people a sense of stability. In the whole interior of Galand, on the west campus, it seems that every building stands on its own hill, deliberately showing its feelings. Zhongmen, Jintang, Galand Pentecostal Tower and West Courtyard are the oldest and largest existing wooden structures in the world, and they are also precious treasures to witness Asuka's cultural thoughts and artistic aesthetics.