Why are the windows of Hakka buildings so high?

Because Hakkas believe in geomantic omen.

The window height of Hakka architecture is generally the size seen by Mr. Feng Shui, which is considered auspicious, and there is no specific size.

Hakka is a branch of the Han nationality, with the characteristics of the Chinese nation. It is the only ethnic group that is not named after the region. It is a Han nationality whose mother tongue is Hakka, and it is one of the locals in Guangdong, Fujian, Jiangxi, Taiwan Province and other provinces in southern China.