Baiyun Lou, Cultural heritage site in Guangzhou, China.

Baiyun Lou is a four-storey reinforced-concrete building at No. 2 Baiyun Road in Yuexiu District, Guangzhou, named for its position at the southwest end of Baiyun Road. It faces southeast, measures about 93 m along the front and 74 m at the rear with a depth of about 28 m, covers 1,600 m² and has 6,700 m² of floor space.

Baiyun Lou was built in 1924 as a three-storey reinforced-concrete post office on Baiyun Road in Yuexiu District. In March 1927 the writer Lu Xun moved in from the Zhongshan University clock tower and wrote works there before leaving Guangzhou that September. After 1949 it became a dormitory for postal and telecommunications workers, and a fourth floor was added in 1970. It was listed as a Guangdong Provincial cultural relic in December 1979.

The name Baiyun Lou comes from its position at the southwest end of Baiyun Road. Lu Xun lived here from March to September 1927, moving in from the Zhongshan University clock tower, and wrote works including "Morning Blossoms Plucked at Dusk" and "Er Yi Ji" during that stay.

Baiyun Lou stands at No. 2 Baiyun Road, at the southwest end of the street in Yuexiu District, near the Dongshankou area. The building faces southeast, with a frontage of about 93 metres along the road. Visitors approach from Baiyun Road; the Lu Xun residence rooms are on the upper floors of the four-storey block.

The building was originally three storeys of reinforced concrete, facing southeast, with a frontage of about 93 metres and a rear length of about 74 metres. A fourth storey was added in 1970, when it served as a dormitory for postal and telecommunications workers.