Suzhou and Hangzhou are quite near to Shanghai, but far away from Guilin, Xian and Beijing. According to the distance, it would be good to travel like this: Suzhou, Hangzhou, Guilin, Xian and Beijing. From Shanghai to Suzhou, Suzhou to Hangzhou and Xian to Beijing, you could choose to take train. While from Hangzhou to Guilin and Guilin to Xian, it is better to take flights as it takes more than 20 hrs by train. About the cost, you can search on the website.