Mr. Chen from Aoqun through the website and contacted customer service manager Ms. Wang by phone. He told Miss Wang that they made Erlenmeyer flasks, which were basically exported. Each Erlenmeyer flask was equipped with 1 Erlenmeyer flask cleaning brush, and the amount was very large. The Erlenmeyer flask cleaning brush I bought before has very unstable quality and will lose filament. Although the supplier has returned or exchanged the goods, every time it takes almost a full inspection to be assured of delivery, a lot of labor is wasted and very troublesome.

After listening to Mr. Chen's story, Miss Wang was very sure to tell him that if the Erlenmeyer flask cleaning brush showed filament loss, it was a substandard product. The Erlenmeyer flask cleaning brush such as Aoqun will not come out to the customer. From the first stage of production, Aoqun has quality supervision. It is required that the pull force of each product 5 filaments must be ≥3 kg, which is more than a bunch of filaments. Ten times stronger, this standard can fully meet the needs of use. After listening, Mr. Chen sent an address to Miss Wang and sent several samples of Erlenmeyer flask cleaning brush to him for confirmation.

A week later, I received a phone call from Mr. Chen again: "The Erlenmeyer flask cleaning brush from Aoqun really has quality assurance. After the test, there is no filament loss. The hand-pulled filament is very stable, and it is absolutely safe to use. Today I will let the purchase order to you, Make 100,000 first."