Small village in the Tai Hang area, next to a stream. It was built by Hakka families who lived on farming and fishing, they kept some of the first dairy farms on the Island, and also did laundry work (Source). The small village was likely built in the 1860s and can be seen in a photo taken by W.P. Floyd in 1868. The marker and the outline are probably not very exact.
In 1894, land was purchased by one of the Hakka families who built the houses 30 & 31 Sun Chun Street soon afterwards. The Historic Building Appraisal for these still existing houses reports that they were built in the old Tai Hang village. My guess is that they were built next (north-west) to the existing older houses which stood in the (today's) block of 30-51 Sun Chun Street.
The 1868 photo shows terraced single-storey houses. It can be that they were replaced around 1910 or later by new houses. The 1913 map on hkmaps.hk gives a different shape compared to the ones on older maps. The houses can still be seen in the 1945 aerial photograph on Gwulo.