1) you probably need a guide to understand what’s going on because palaces are not allowed to enter. So it’s unclear what’s the purpose of the building you are looking at.2) it’s better to come earlier because You have to survive 3 queues to get inside.3) There’s lots to see and explore. With museums and Jingshan park It might take a whole day. So don’t plan Summer palace or the Great Wall on the same day.4) All in all it’s a nice place to see.