Now companies generally don't hire design apprentices unless someone can take you. If you want to develop jewelry, or you can learn jewelry knowledge and technology, manufacturing technology, marketing and so on, and you are an art major. Maybe you can go to some better private institutions to learn design skills. There is quite a lot of jewelry design training in Shenzhen. I hope you can find a good one to develop in this field. I do this too, but I'm not in Shenzhen.