I read in the internet, there's also paragliding and wall climbing here in Baiyun Mountain?

Yes, that is right. There are such extreme sports in the scenic area. You can climb the mountain from the gate near Meihuayuan and walk along the road to Moxingling. On the way, you will see a large bold cliff, which is for wall/rock climing. And the paragliding can be found at the extreme sport center in the scenic area.