January 2011？Two days in Guilin are enough, including one day in yangshuo. January is dry season, but cruise from Guilin Zhujiang Ferry Terminal to Yangshuo along Li River. Then fly to Guangzhou from Guilin. You can visit Shenzhen by bellet train from Guangzhou and Hong Kong either. Give up Hong Kong if you have single entry visa to China, because you have to leave from Guangzhou finally. If you want more time on seeing scenery, you can have a side tour to Longsheng from Yangshuo. The Dragon Back Terraces in Longsheng is famous. Many ethnic minority's villages there. Photographers like this place. You can take the picture snow scape of the terraces.