Core Viewpoint - ST Jingji (000821.SZ) has established substantial cooperation in the perovskite equipment sector with various leading clients, focusing on research collaboration, pilot testing, and localized services [1] Group 1: Client Categories - The primary clients in the perovskite equipment field can be categorized into three main types: large enterprises with strong capital or financing capabilities, traditional photovoltaic industry leaders, and other head clients [1] - The first category consists of large enterprises that maintain close business cooperation and technical exchanges with the company [1] - The second category includes traditional photovoltaic leaders, who were already significant clients for the company's crystalline silicon equipment, and are now extending their collaboration into the perovskite equipment sector [1] Group 2: Focus Areas - Current focus for traditional photovoltaic leaders is on the supplementary applications of perovskite technology in crystalline silicon battery fields [1] - The company is continuously deepening its layout in areas such as research and development collaboration, pilot testing validation, and localized services with various leading clients in the perovskite equipment sector [1]