Yes, there was a concrete case of a quality fading problem in which, in order to save money, the chemical formula of a shampoo was changed and with this change, at the beginning, there were no obvious changes but when it started to cold, the shampoo had become gelatinous and blocky. The factories didn’t want to confirm that they changed the formula in order to protect the supplier but the problem was solved when the customer of the factory decided to increase the costs to return to using the old formula.