510000, the postal codes of Guangzhou: Yuexiu District 510030, Liwan District 510145, Haizhu District 510220, Tianhe District 510630, Baiyun District 510080, Huangpu District 510700, Panyu District 511400, Huadu District 510800, Nansha District 511400, Zengcheng District 511300, Zengcheng District 511300.