What is the fine-grained topic of the following text: We are also focusing on improving the stuff management and QC system so that we could keep great advantage in the fiercely-competitive business for Factory Directly Supply Black Goji Berries , Factory Directly Supply Black Goji Berry , Factory Directly Supply Black Wolfberries , we assume to produce a wonderful foreseeable future with every customer. Only return the topic.
Improving staff management and QC system in the fiercely competitive business of supplying Black Goji Berries and Black Wolfberries directly from the factory.