order of visiting attractions in Nanjing

To be honest, it may be hard to cover all attractions within a day. Anyway, using the itinerary below, you can make full use of your day:
Dr. Sun Yat-sen's Mausoleum - Terrace of the Raining Flowers (Yuhuatai) - Xuanwu Lake - Drum Tower (Gulou) - Confucius Temple (Fuzimiao) and nearby pedestrian
It can be interesting to visit Fuzimiao at night.

If it's not possible to tour NJ in 1 day. Please just give me a list of all the sites to see. We will be in the Pukou District so that's our start off point.
Thanks!

Here are all worthy attractions I know:
Confucius Temple (Fuzimiao)
Xiaoling Mausoleum of Ming Dynasty
Dr. Sun Yat-sen's Mausoleum and nearby Linggu Temple
Qinhuai River and The Memorial Hall to the Victims in the Nanjing Massacre
Nanjing City Wall
Purple Mountain Observatory and nearby Mount Qixia
Xuanwu Lake
NJ Musuem
Xuanyuan Garden
Rain Flower Terrace (Yuhuatai)
Hongshan Zoo

Thank you so much Sarah! Would you also know what time these sites open & close? And if there's entrance fee?