A group of 10 coming from Xi'an - 6 days 5 nights to Luoyang.

I think 2 to 3 days are enough to cover the highlights of Luoyang. The must see places in LY are Longmen Grottoes and White Horse Temple. Besides, you may also visit some other places according to your own interest, such as Chariot and Horse Pits, Luoyang Museum, Wangcheng Park, Guanlin Temple, etc.