胜蓝股份：公司主要客户包括立讯精密、联想、华勤等

Group 1 - The core viewpoint of the article is that Shenglan Co., Ltd. (300843.SZ) has identified its main customers for I/O connectors and backplane connectors as Luxshare Precision, Lenovo, and Huaqin [2] Group 2 - Shenglan Co., Ltd. responded to an investor inquiry on an interactive platform regarding its key clients [2] - The company operates in the connector industry, specifically focusing on I/O and backplane connectors [2]