(b)(4).We have proceeded the following investigations after receiving the complaints: for the item of b-1000, there has been no change since we start making a proof and put it into production.Based on the customer feedback, we compared and confirmed the existing products with the samples provided by customers in the proofing stage one by one.We compared the existing product with proofing sample.It can been seen that they do have differences.The drainage tube of existing product is slightly longer than the proofing samples.At that time, we considered the drainage tube in the actual use of the product, so we lengthened the tube to facilitate the folding and drainage, and it will not affect the use of the product , nor will it cause harm to patients.According to the tests, the product style we currently produce is slightly different from that provided by the customer in the proofing stage.However, there has been no change on the product since we got the customer's confirmation and started production.Each process of the existing products has been effectively confirmed, they are safe and effective.
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