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 . 