What are the selection requirements for the water tank of the wall-mounted toilet?

As a new flushing tank product, the material, technology and internal water components of the tank are more important because the tank is hidden in the wall. In addition, when choosing toilets and water tanks, we must understand that "toilets" and "wall-mounted water tanks" need to be purchased separately. Generally speaking, relatively professional bathroom brands will produce wall-mounted toilets, but they will not specialize in manufacturing hidden water tanks. Therefore, at the time of purchase, in order to ensure the quality of the water tank, it is recommended to choose products that specialize in producing and developing hidden water tank brands.