Hi, Stopover in Guangzhou for 12h. Which shuttle is best to go to city centre and return?

Haizhu Square is kind of the city center, and the shuttle bus line 5 leads to the square directly. Subway is also accessible: take the line 3 from airport south to Jiahe Wanggang Station, where you can transfer to Line 2 to Haizhu Square directly.

When you return to the airport, these two reversing routes are also feasible.