The water retention of GinShiCel® cellulose ether can significantly reduce the moisture absorbed by the substrate and tile in the mortar, significantly prolong the opening time, increase the coating area, and improve the work efficiency; The suitable viscosity of cellulose ether can give the best consistency of mortar, improve the wetting ability of mortar and ceramic tile and substrate, especially for the formulation of high cement ratio, can improve the adhesion of mortar. Specially modified cellulose ether can ensure that heavy ceramic tile, marble and other construction will not slip.