A good general introduction to Dongguan, with information on and contacts for all the government departments, can be found at the official government website: http://english.dg.gov.cn/
The Dongguan Bureau of Foreign Trade and Economic Cooperation can handle English enquiries: (86-769) 2281 9731, or www.dgboftec.gov.cn/en
The Songshan Lake Science and Technology Industry Park has information in English at www.ssl.gov.cn/english, and can be reached at (86-769) 2282 2222.
Some of the bigger towns have their own websites. Chang’an is officially at www.changan.gov.cn/english, while Humen has the garment trade to thank for a private-sector initiative, www.humen.com/english.
Since 2004, Dongguan has had an international school for ages 3-13: QSI, which also has a school in Shekou, Shenzhen. It is based in Chang’an’s Lotus Villas, but provides a bus service for all students. See the school’s website for further information: http://cgn.qsi.org/