The Li Tang Dynasty, due to its unique development conditions and environment, created a brilliant culture of national unity, social stability, economic development, ethnic integration, and confident openness. The open Tang Empire attracted students, scholars, foreign merchants, generals, and envoys from various countries. Emperor Taizong of Tang was even revered as the common sovereign of all ethnic groups - the Heavenly Khan. As the saying goes, "a three-foot child can recite the poems of Li Bai and Du Fu", and the gathering places of Chinese in Europe and America are called 'Tangren Street', showing the infinite charm and far-reaching influence of Tang culture. This book tells the story of the emperors of the Tang Dynasty, a special group living in such a historical space-time. This book alternates between close-ups and long shots, sometimes detailed depiction, sometimes panoramic overview, carefully discussing the 21 emperors of the Tang Dynasty, showcasing the ups and downs of the imperial court life of the Great Tang Empire. The approach is unconventional, hoping that in each flash of the shutter, different angles of focus can be used to capture the secrets and stories buried in the historical archives, analyzing the rise and fall of the Tang Empire over 290 years.