Literature Reference: 珪币咸列，笙竽备举。—— 《郊庙歌辞 五郊乐章 白帝商音 雍和》 Jade and silk offerings are arranged in rows, while sheng and yu instruments are prepared. Source from 'Jiao Miao Ge Ci Wu Jiao Yue Zhang Bai Di Shang Yin Yong He'.
笙: The instrument, typically crafted from thirteen bamboo pipes of varying lengths, is a traditional Chinese wind instrument.
竽: Ancient wind instruments.
Meaning: Sheng and yu are important ancient instruments, symbolizing the prosperity and harmony of ritual and music culture.