Xi (玉玺) is the seals(印章) owned by the Chinese emperors. Dynasty after dynasty the emperors used the seals     1     ( establish) their power and identity. For their unique function, seals reflect Chinese history in     2     special way.

In Zhou Dynasty, emperors     3    (start) to use seals. When it came to Qin Shihuang, the jade(玉制的) seal got     4    (it) name, Xi. Different     5     Yin, the seals were used by officials and ordinary people.

In history, the emperor     6     (own) the most seals is Emperor Qianlong,     7     is said to have more than a thousand seals.

As a royal symbol, the creation of jade seals     8     (consider) a form of art. They are     9    (usual) made from jade and other twenty kinds of materials. And     10    (pattern) on the face are various, including Chinese characters, landscapes, figures, birds, or flowers.