Toilet wash basin into the water pipe to stay high
According to the master's height adjustment, from the ground to the top edge of the basin 80cm to 85cm or so
Wash basin hot and cold water generally from the ground size of 35 - 40 cm or so can be.
This should be combined with your washbasin, the general height of the wash basin in the 800-900mm, the water pipe must not be higher than the basin, the shorter the better the length of the water hose, the general 200-300, so you can consider from the ground 500-600 The Upstairs to answer seems to be too high, a low side.
Bathroom wash basin into the water pipe to stay 50CM can, because the faucet above the wash basin comes with the tube.
