Transportation from Beijing to Mutiyanu Great Wall

Hello! We are a group of 3 traveling to Beijing 2nd week of August and would like to see the Mutiyanu Great Wall. However given the extreme heat, we don’t wish to spend more than 2 hours there. Just a quick trip and not necessarily a guided one.All the tours I see on trip.com, viator etc is a minimum of 5 hours. Is there a way that I can book for some transportation alone instead of booking a whole tour. We don’t wanna go on private transportation with just us 3 since that’d be expensive! Could be a private bus service with set bus timings. We’ll be staying near the Temple of Heaven. I’m not entirely sure of the public transportation. Please help.Thankyou!