We highly recommend you buy the guidebook "Yangshuo, Rock Climbing" by Paul Collis ... take a train or boat to Shenzen, then continue to Guilin by plane or train. Visas can be obtained in Hong Kong.
In their introduction the authors Kevin Wojton, Karen Thang and Ana Pautler stateChina boasts some of the most stunning locations for climbing in the world ... from the famous crags at Yangshuo ...