Hey,Jayanta,I am Fly,I am happy to hear that you are coming to Shanghai soon at May,I am currently working in Shanghai and would like to tell you the latest information about the weather here,right now,it's beautiful sunshine everyday!I am enjoying it!Also I'd like to introduce you a good hostel to stay,its name is Hiker Hostel,located very close to the famous Nanjing road,price is ok,and ninty percent costomer are from abroad,the atmosphere is great!I'd like to giveyou my e-mail so that you can ask me any question anytime when you need.it's jfx333256@hotmail.com,Enjoy your travelling!