Senior citizens walk in Terro Cotta Army

Hi there,

I'll be visiting with my aged parents. I've read that it's a big place and requires a lot of walking. I'm not sure if my parents are capable of long walks. Are there any wheelchair services if one needs it? How about seats along the place to take a rest? We'll most likely take the bus no.5 from city. I've read that its a long walk in. Are there like buggy services?