9 hours layover in Beijing

I have 9hour layover (14:50 - 23:40) in Beijing on the 5th of May and I want to visit the Great Wall, Forbidden City, Temple of Heaven and Summer Palace. Will it be possible to visit all these places with the time I have and what is the best way to go there (hired taxi, train or bus?) Also, what place can you recommend to visit night time. I'll be travelling alone. Thanks!!