Quality G is an advanced product standard with independent intellectual property rights in China. Quality R means that the trademark has been registered in the State Trademark Office and passed the examination of the Trademark Office; Quality n is the identification of safety level of quality system.

At the level of quality control, R stands for defective products; R in cement type stands for early strength type.

Quality refers to the quality of goods. No matter what you produce, you should pay attention to product quality.