Sung Wong Toi, Song dynasty inscribed stone in Kowloon City District, Hong Kong.

Sung Wong Toi is a large carved stone block displaying Chinese characters from several centuries in Kowloon City District. The rectangular piece stands in a garden at the intersection of Ma Tau Chung Road and Sung Wong Toi Road, surrounded by trees and low walls that separate it from the traffic.

The original characters commemorate two young Song dynasty emperors, Zhao Shi and Zhao Bing, who fled to Hong Kong between 1277 and 1279. Later generations added further inscriptions during the Qing dynasty in 1807 to preserve the memory of their flight.

The carved character is 王 (king), not the expected 皇 (emperor), though both are pronounced "wong" in Cantonese; this may have spared the stone the anger of the Yuan rulers. The colonial government chose 皇 for the park, the nearby road and the MTR station. In the 1950s, Song descendants living in Hong Kong held memorial rites for Emperor Gong and Emperor Bing in restaurants near the stone.

The garden is accessible during daylight hours and easy to reach on foot from surrounding streets. Several bus routes stop nearby, and the MTR station lies about 15 minutes away, making it easy for visitors to arrive.

The stone now displayed is only about one-third of the original boulder, which measured roughly 45 metres in height. The surviving inscribed portion was cut into a rectangular block and placed in the garden built for it, which opened in 1960. A vertical column of seven smaller characters on the right records a renovation carried out in 1807, during the Jiaqing reign of the Qing dynasty.