Nanning is a city in China and the capitol of Guangxi Province.
From the Guangxi Daxue (University) Busstop take the Bus Number 76 all the way to the last stop Langdong Bus Station 琅东汽车站. Walk to the right side after you leave the building and cross the junction, then you should already see the toll station. From there it is super easy to find someone going that direction. User Ruebezahl got even approached and asked if he want to come with the driver to Liuzhou, before he could ask anyone.