The city of Panyu was already on this location back in 200 BC. Arab and Persian merchants arrived in Guangzhou in 8th century. The Portuguese were the first Europeans to arrive by sea in 15th century and the city was known as Canton to its 19th century foreign residents. Today Guangzhou is 4th largest city in China, with 11 million inhabitants (in 2010) and this is excluding millions of migrant workers. It is well connected with Shenzhen and traveling by bullet train will take you only 1 or 1.5 hour to get there. I unfortunately spend only one weekend in the city and can share just few of highlights.