Built above three levels of marble stone base, and surrounded by bronze incense burners, the Hall of Supreme Harmony is one of the largest wooden structures within China.

[1] The six pillars nearest the imperial throne are covered with gold, and the entire area is decorated with a dragon motif.

[2] The Hall of Supreme Harmony features an exquisite throne made of red sandalwood, and formerly used by the emperors of the Qing dynasty.

Set into the ceiling directly above the throne is an intricate caisson decorated with a coiled dragon, from the mouth of which issues a chandelier-like set of metal balls, called the "Xuanyuan Mirror", a reference to the Yellow Emperor, a mythological Chinese ruler.

As a result, the location was changed to the Inner Court, and the Hall of Supreme Harmony was only used for ceremonial purposes, such as enthronements, investitures, and imperial weddings.