Which dynasty was the most mysterious in the history of China?

According to historical records, the most mysterious dynasty in China history should be Shang Dynasty. There are many unsolved mysteries in the history, politics, society, culture and religion of Shang Dynasty, such as the marriage relationship between the king and queen of Shang Dynasty, the truth behind myths and legends, the meaning of Shang Dynasty characters, and the details of ancient sacrificial ceremonies. In addition, the Shang Dynasty is one of the earliest dynasties in the history of China, with a history of nearly 4,000 years, which makes people more curious and imagine this mysterious and legendary era.