about 714.6 kilometers.
according to the Baidu map, the whole journey from Dongguan to Changsha is about 714.6 kilometers, and it takes about 7 hours and 57 minutes by car, passing through Guanglian Expressway and Xuguang Expressway.
Changsha cuisine includes: Changsha rice flour, Changsha stinky tofu, salted duck, shrimp flavor, swamp powder, sugar cake, fish head with chopped pepper, melon jelly and so on.