Jiangsu tv tower in Nanjing

Sorry to tell you, it’s not open to public now. But you can go to Zifeng Buliding to admire the whole city, which is in 1 Central Rd.

i've heard from my roommate that the observation floor of Zifeng is closed now, but the restaurants and hotels in Zifeng may work as substitutes. Also, a new observation platform has been accomplished at the top of Purple Mountain. As for other places near Qinhuai or Yangtze River where you can get a commanding view of the city, maybe you have to wait for the skyscrapers being built near the Olympic Stadium.