通宝光电：业绩高度依赖上汽通用五菱，高毛利率逆势反超同行，低研发投入背后逻辑待解｜IPO观察

Core Viewpoint - Changzhou Tongbao Optoelectronics Co., Ltd. (referred to as "Tongbao Optoelectronics") has submitted a prospectus for an IPO on the Beijing Stock Exchange, planning to publicly issue no more than 18.7934 million shares. The company's performance growth is heavily reliant on its partnership with SAIC-GM Wuling, with over 60% of its revenue coming from this single client, which is projected to rise to 83.35% in 2024 [2][4][5]. Customer Dependency - Tongbao Optoelectronics' revenue from its top five clients accounted for over 94% of its total revenue during the reporting period, indicating a significant customer concentration risk [4][5]. - The sales revenue from SAIC-GM Wuling for the years 2022, 2023, and 2024 were 26,044.05 million, 33,876.85 million, and 48,995.02 million respectively, representing 68.83%, 63.99%, and 83.35% of total revenue [5][8]. Unique Client-Supplier Relationship - A notable aspect of Tongbao Optoelectronics' client base is the dual role of Huayu Vision as both a major customer and supplier. Huayu Vision has consistently been the second-largest customer while also being the largest supplier, creating a unique competitive dynamic [2][7][8]. Financial Performance - The company reported revenues of 38,969.78 million, 52,944.69 million, and 58,778.96 million for the years 2022, 2023, and 2024, with net profits of 3,669.29 million, 6,224.85 million, and 8,309.35 million respectively, indicating continuous growth [4][5]. - The gross profit margin of Tongbao Optoelectronics has been increasing, reaching 24.07% in 2024, which is higher than the industry average that has been declining [11][12]. R&D Investment vs. Profitability - Despite the rising gross profit margins, Tongbao Optoelectronics has maintained a low R&D expense ratio compared to industry peers, with rates of 3.43%, 3.80%, and 4.06% during the reporting period, significantly below the industry average [13]. - The company's business structure is heavily focused on automotive lighting systems, which accounted for over 94% of its main business revenue during the reporting period [11][12].