Tang poetry is the first-hand historical data to study the history of the Tang Dynasty.

Tang poetry is not the first-hand historical data to study the history of the Tang Dynasty. First-hand historical materials include notes, works and records made by the parties to major events in history.

The uprising in Wu Guang, Chen Sheng, as described in historical records, was due to the fact that the Qin law stipulated that anyone who delayed the date would be beheaded. However, from the Qin bamboo slips unearthed in recent years, it is not as serious as beheading. Because the unearthed Qin bamboo slips directly record the decrees of the Qin Dynasty, compared with historical records, the unearthed Qin bamboo slips are first-hand historical materials.

First-hand historical materials, also called original historical materials, are the earliest and most primitive records of history. The history books we see now are all written by later generations with reference to different materials. It is not as good as historical records, which refer to different materials, but due to the influence of the author's time, position and environment, it will inevitably be mixed with personal feelings, and it will be different from the facts due to the age of the materials.