1. chinese rugs surface requires a flat dense, clear lines, no color difference; chinese rugs and chinese rugs back are no wear, such as weight, no rules, density, thickness and inconsistent, left needle threadbare, defects, or inferior product. 2. the touch test, thickness, thickness uniformity, gently by hand, after loosely, chinese rugs surface immediately back to the original image, no “down”. 3. after flooring, colorful patterns, symmetry, cut evenly, a third dimension. If the difference in color, Monotone for faulty goods. Check that the back is strong, there is sparse, glue back tough, no-cracking phenomenon. Base line at the end, crack cracked. Otherwise, unqualified.