At the beginning of the design, because the product characteristic is that the displacement is particularly large compared with similar products, because the size is larger than others, of course, the most important thing is to add a siphon structure. The more water is discharged, the faster it is discharged. Even if the toilet pipe is broken, there will be no water level of more than 1cm, which effectively prevents the home from being soaked due to the rupture of the toilet pipe. Because the head is large and high, the height and capacity of the water seal are also very large, and the deodorant effect will not be lost because it is useless for two or three days. In terms of modeling design, the whole series of products are designed with rotating patterns at the beginning, hoping to show the visual feeling of drainage like a vortex. In the later period, because the products are larger than similar products, it is inconvenient for workers to install, and other series of categories.