I want to travel from Guangzhou to Suzhou, Wuzhen and Shanghai during the National Day holiday. Where should I go first, and then how can I go back and forth by bus?

Take a bus from Guangzhou to Hangzhou and then transfer to Wuzhen. There is a special bus from Hangzhou to Wuzhen, which seems to be in hangzhou east railway station. In Wuzhen for a day or two, there are two scenic spots in Wuzhen, Dongzha and Tashi. Personally, I think the night view of Tashi is very beautiful, so I can't miss it. If Dongzha is like this, you can decide whether to go or not, then visit Wuzhen and transfer to Shanghai. Shanghai is going to the Bund, Oriental Pearl, City God Temple, Nanjing Road and so on. After visiting Shanghai. You can go back to China after visiting Suzhou. You can search for specific places and attractions on the Internet.