Hung Lau, Urban park in Tuen Mun, Hong Kong, China.

Hung Lau is a two-storey red-brick house built between 1905 and 1910 in Pak Kok, Tuen Mun, mixing Chinese and Western styles. It stands within the Sun Yat-sen Commemorative Garden, built in 1983, which holds a bronze statue of Sun Yat-sen and a 20-foot obelisk monument.

Hong Kong merchant Li Ki-tong, who met Sun Yat-sen in 1895 and joined the Revive China Society in 1900, provided his farm at Pak Kok as the society's secret base in 1901. The farm, with orchards, poultry and hidden arms stores, hosted planning for the 1911 Huanghuagang uprising. The house itself was built between 1905 and 1910. In 2017 the Antiquities Advisory Board declared it a proposed monument after the new owner demolished a wall.

The garden beside Hung Lau is one of the few places in Hong Kong where the flag of the Republic of China was flown continuously. Since 1968, ceremonies have been held there every 1 January and 10 October, organised by Johnny Mak of the Highwise Yuen Long Service Centre. Since 2018 the owner has blocked entry on those days, and in December 2020 five commemorative plates were spray-painted and the flag poles removed.

Hung Lau stands on the former Castle Peak Farm plot at Pak Kok, off Lung Mun Road, beside the Tuen Mun Public Riding School and near Butterfly Estate. The house and memorial garden are privately owned and have been fenced off since 2018, with guards and police turning visitors away on Double Tenth and New Year's Day, so check access before travelling.

The garden holds a 20-foot obelisk erected on New Year's Day 1969, topped with a blue-and-white sun emblem, with a 370-character inscription by Hong Kong's Chow Tsun-nin. Six arenga palms once stood before the house, three planted by Sun Yat-sen and three by Huang Xing; all have died, leaving only the memorial text.