We have some quality-control problems . Mr . Zhang . We need to go to the source to work them out .   What problems are you having exactly ?   The complaint rate for our new product line is very high , almost eight percent .   That is high .   Yes . We keep finding problems when testing the sound boards .   But your promotional materials claim the broads are the least expensive of their types on the market .   The least expensive , but still fully functional . And we think that your factory needs to take measures to improve quality-control .   That will involve additional expenses for us , which we will have to pass on to you as a rate hike .   I am afraid that is not acceptable . Your contract says that you will deliver a product with a reject rate of less than six percent . 