Shanghai: Trains from Shanghai to Hangzhou
No. Just go to railway station. Very important bring passport and enough cash to pay for ticket about 80-120 RMB depending on what class
Shanghai: How to go to the train station boud to Yiwu from Pudong Airport
shanghai metro will get you there by train. Just get a metro map or do a search on google. Will cost about $2
Singapore: 2 week SE Asia solo exploration holiday- any advice?
Start in Singapore. There are buses that leave Singapore via Malay to Thailand I loved it! Stop offs on the journey were great such as Malacca & Kuala Lumpuretc...
Shanghai: Between Hangzhou & Shanghai
Train to Hangzhou - Shanghai is very good, forget taxi
Shenzhen: Travelling to Beijing
Catch the train, best way to travel in China is train