How can I get to the nearest Great Wall if I'm staying near to Maquanying subway station, Beijing?

Hi, the closest part should be Mutianyu Great Wall. From Maquanying, you can take subway line 15 to Wangjing West, where transfer to line 13 and get off at Dongzhimen. Walk to Dongzhimen Bus Stop to take Express Line 916 and get off at Huairou North Avenue (Huairou Beidajie). Thereafter, take a minivan to the wall at a cost of CNY50 or around.