Beijing - Guilin - Hong Kong

Hello Group.....So I have a few days left after a work trip to Beijing and I am interested in checking out GL then heading to Hong Kong to fly out. The bullet train looks like a good option for travel from Beijing, but it might actually be a bit too fast for my taste. Any ideas on a good path to take that is efficient, scenic and terminates in Hong Kong? I have 4 full days and fly on the 5th day..... any suggestions would be appreciated.