I had read about certain websites like youtube not accessible from China with the wifi there. To do so would require VPN.
Well I am now in Shanghai and would like to share that i am able to access all these so called banned websites. Not through the local wifi though.
How do I do it? Prior to my arrival, I bought a Starhub (Singapore local telco) pre-paid data simcard ('happy roam') that allows me to surf overseas at a cheap rate. I used the dataplan to surf web and make phone call via whatsapp.
For those who are not from Singapore, perhaps you can look for something similar in your home countries.