On the one hand: Bottom basin drainage is not smooth or water.
1.Check the drain, drain pipe is blocked not smooth.
2.Check whether the ground is level, bottom basin installation is level, uneven adjustment.
On the other hand: The emergence of water leakage.
1.Check the shower cubicles waterproof tape is installed.
2.Check whether the glass glue is installed between the shower cubicles and the bottom basin and the wall.
3.Check whether the gap between the bottom basin and the wall is well sealed.
4. Check whether the water removal device is installed and whether the connection of the drain pipe is sealed.