There are a lot of tickets from Hangzhou to Nanjing. Don't be afraid that you can't buy tickets. You can stay at the Confucius Temple, which costs 156 nights. You can also visit the Confucius Temple. It takes a whole day to go to Sun Yat-sen Mausoleum during the day. The Pearl Spring in Jiangbei of Hongshan Zoo is also good. You can eat barbecue there and so on.