About 7 hours Tour in Nanjing:
Begin your day in the morning with a visit to the magnificent Niushou Mountain （牛首山）which is the place to preserve the Buddha's parietal bone relic. You will find the splendid, amazing architectures. I will explain to you the history of the area with China's Buddhist culture. Spend 3-4 hours exploring the mountain and its surroundings.

After lunch, head to the Zhonghua Gate which is the largest city wall gate among the four left original city wall gates from Ming Dynasty (650 years history). To know the complicated structures and amazing bricks production system. It will take 40 minutes around.

Then we walk to Laomendong ancient-style block which is the replica of the original residential area of Ming and Qing Dynasty (100-600 years ago). You can have a relax time here, hang around or buy some souvenirs.

If you have other suggestions, let me know at any time, I will be happy to customize your travel plan.