bro, there is two vacuum , one is xiaomi vacuum at rmb 1699, this one just sweeper function and no water tank for mop. the 2nd gen stone vacuum ,rmb2499 it improve version where it have additional water tank and mopping function. but all these not available to international market. I manage to get one 2nd gen in December.2017. quite useful but the water tank to me is abit small and need to keep on topping up water .anyway I bought lots of extra brushes and accessories as in SG there's no way to svcs it  but I like the 2nd gen as lots of items is now more lasting