Group 1 - The core viewpoint of the article is that Dongwei Technology (688700.SH) currently focuses on photovoltaic equipment products for HJT batteries and does not involve equipment for TOPCon and perovskite batteries [1]

Group 1 - The company currently produces photovoltaic equipment for HJT (Heterojunction Technology) batteries and does not have equipment for topcon and perovskite batteries at this time [2] - An investor inquired about the company's capabilities regarding topcon and perovskite battery equipment on an investor interaction platform [2] - The company's response indicates a focus on HJT technology, suggesting a potential area for future development or investment [2]