The bronze sacred tree in the play is made of bronze, the origin of which can be traced back to Yao Shunyu's time. According to the ancient documents in the historical period, people began to smelt and cast bronze at that time. Moreover, bronze products have been found in dozens of sites in the Longshan period in the middle and lower reaches of the Yellow River and the Yangtze River during the historical period.
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The bronze age in China is recorded in Xia, Shang and Zhou Dynasties, Western Zhou Dynasty, Spring and Autumn Period and early Warring States Period, which lasted for more than 1600 years. Bronzes in this period are mainly musical instruments, utensils for holding drinks and food, and weapons.
It is said that in the gradual expansion of bronzes, the development of bronzes reached its peak from the late Shang Dynasty to the early Western Zhou Dynasty. At that time, the bronze wares in China were rich and varied in shapes, rich and dignified, and complicated and gorgeous in patterns. It can be said that their unique beauty and value make them have high artistic value in the world.