Postal code inquiry 510399 Yijing Road, Haizhu District, Guangzhou City, Guangdong Province 510399 South Yijing Road, Guangzhou Avenue, Haizhu District, Guangzhou City, Guangdong Province 510399 Diejing Road, South Yijing Cuiyuan, Guangzhou Avenue, Haizhu District, Guangzhou City, Guangdong Province