Hi, any buses from Guangzhou Airport to Tangxia town Dongguan ?

Well, there is no direct bus to Tangxia Town. But you may take a bus to Dalang, Dongguan for CNY 70. The buses are scheduled from 8:10 to 21:00 at an hourly interval, and the duration is about 2 hours. After getting off at South China International Automobile Accessories City, you may take bus line 839 from Huangjiang Bus Station to your destination. :)