I noticed a bunch of signs like this lately saying "Zuojiazhuang". The first word "zuo" is my family name ("Chor" was transliterated from Cantonese; the Mandarin pronunciation is "zuo".) The phrase "Zuojianzhuang" means "Chor Family Village". It turns out there's a section in northeast Beijing, between the Second and Third Ring Roads (just north of Sanlitun, if you know Beijing) that is called Zuojiazhuang. My driver thinks there must have been a rich family named Zuo that used to live there a long time ago. I'll have to see what else I can learn about this.
You can see the location here in Chinese Bing maps.