- HFMD Cases Up 440% In 2010 in Guangdong Province (Dongguan) Dongguan ( simplified Chinese : 东莞; traditional Chinese : 東莞; pinyin : Dōngguǎn , Cantonese : Dung1 gun2; old spelling Tung-kuan) is a prefecture-level city in central Guangdong province , People's Republic of China . An important industrial city located