Mr. Zhong is the purchasing manager of an industrial vacuum cleaner company. Some time ago, he called Aoqun Xiaoliu, saying that the industrial vacuum cleaners produced by the company needed a large number of brushes, but the brushes required anti-static function, and asked whether Aoqun produced vacuum cleaner power brushes.

Mr. Xiao said to Mr. Zhong: "Aoqun specializes in producing vacuum cleaner power brushes for more than 20 years, with an anti-static level of 10⁴—10¹²Ω. The products are available in the shape of arch bridge, oval box, square box, etc.; The brush is flush, tight, and tensile strength ≥ 6KG." 3 days later, according to the drawings provided by Mr. Zhong, Xiao Liu delivered a model for him to test.

Ten days later, Mr. Zhong gave feedback to Xiao Liu: "The vacuum cleaner power brush model has been tested by our technical department. The anti-static effect is good and meets the requirements of our products. Aoqun is really good."