to find a good shanghai map and the Koala international youth hostel in shanghai

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hello, i'm french ! i will make a journey through china, and in particular at shanghai ! it'll be a marvellous trip, sure ! but please help me to find on internet a good map of shanghai (which permit by entering the name of the road, to find it easily and quickly!) and also the location of the Koala international youth hostel in shanghai ! thanks a lot for your help ! michaël