It's been a year since Chow Tai Fook bought Boston diamond brand Hearts On Fire. Kent Wong, managing director of the world’s largest jeweler, talks about his plans for the brand.JCK: What do you see next for Hearts On Fire? Kent Wong: We acquired the brand one year ago. We appreciate that we have a great team in Boston. We expanded the design team from one designer to six, and the designers are from all over—New York, Hong Kong. We are committed to producing the best design. We are also expanding the management team.We will increase our investment in marketing. We have more than doubled the marketing budget this year. We will launch a new TV commercial to inspire customers to dream of diamonds.JCK: Will Hearts On Fire expand into low-end price points?Wong: We have a group of very loyal retailers. They believe the dream. It is not easy to sell Hearts On Fire. We cut the best of the be