1. Appearance: appearance, demeanor. Dangtang: dignified, generous, and majestic. Describes a person's appearance and demeanor as solemn and generous.
2. Honor guard [yí zhàng duì] is a small unit assigned by the army to perform important ceremonial tasks. Sometimes a band is attached to greet heads of state or distinguished guests.
3. Armillary sphere [hún tiān yí] is the general term for armillary sphere and armillary image. The armillary sphere is an instrument for measuring the spherical coordinates of celestial bodies, while the armillary sphere is an instrument used in ancient times to demonstrate celestial phenomena. The inventor of the armillary sphere was Zhang Heng, a great scientist in the Eastern Han Dynasty of my country.