"ChiTu Systems" is a company based in Shenzhen that develops boards for many popular resin 3D printers on the market, including systems developed by Elegoo, Phrozen, and EPAX 3D. They are also behind Chitubox, a commonly used resin slicer. However, there have been some controversies surrounding the company. They recently encrypted some of their newer LCD boards to only work with its new ctb file format, a format that can only be generated using either Chitubox Basic or Chitubox Pro. This decision has led to some backlash from the community. Additionally, there are mixed reviews about the company's customer service. While some customers have had positive experiences, others have reported issues with the company's products and support. Therefore, it's recommended to do thorough research and consider these factors before engaging with the company.