Shanghai is a nice entry into China experience as it is a seemingly western metropolis that has not shed it's Chinese roots. It is Chinese through and through. I spent eight days here and felt it was four days too long for this experience. A lot of my roommates seemingly moved to Beijing and stayed there as there are more historically and culturally significant things to see there. They did mention polution and poorer subway system, which seemed very intuitive, for a first time user like me.
Insider Tip:East Nanjing Road was testing my patience with pimps approaching me every 5 minutes peddling a girl massage, same as on the Bund. There was even a hooker who had me take her picture on the Bund, then tried to have me go with her to some tea tasting. Beware. Get a Chinese foot / body massage, at one hour each cost total of 135 RMB, totally worth it. There's one next to Box Cat Brewery, Sooth Wind. Then relax at the brewery w cheap microbrews. Fake Market at Sc and Tech Museum stop, line 2 Metro. Offer10%20%