"No.1 Longxu Red" plate processed by the company has been detected by Stone Quality Detecting Centre of China Construction Material Office, as per technical requirement of GB9966-88《Natural Facing Stone Test Method》and JC/T204-92（96）《Natural Stone Material》, performance indexes such as density ,water absorption, drying compressive strength, bending strength etc., all reach the technical standards.

   According to control standard（JC518-93)in 《Classification Control standard of radioactivity of natural Stone, "Longxu Red" is A grade stone, the range of application hasn't any limit ,it is a kind of environmental stone rarely.