Nanjing Railway Station to Purple Mountain

I'm planning to visit in May and have a few questions:
1) Does Tourist Bus No. 1 stop at the Railway Station (NOT west, east, north or south) and go to the Sun Yat-sen Mausoleum?
2) How long does the journey take? Is this the shortest route?
3) I'm also planning to visit the Ming Xiaoling Mausoleum. Should I go there first or the Sun Yat-sen Mausoleum?

Thanks.